No, it's not close at all. Like I said, percentages are scalar quantities, not definitive quantities. 45% and 55% could be 45 and 55, or 45 billion and 55 billion. 10 isn't that much, but 10 billion is. It's ironic when you keep thumping your chest that you did your math, but in actuality, you're just trying to spin a negative outlook into an impossibly good situation for the X1.
As said before, we're potentially seeing a 600-700k gap. For the X1 to outsell the PS4 this year, it need to sell at least 25k more a week. That is not possible because the PS4 has the mindshare of the consumers and has the better games. Destiny is a pseudo-exclusive for the PS4 because Sony has exclusive advertising rights to the IP. Look what happened with Watch Dogs. Look what happened with the multiplats before that like MGS: Ground Zeroes, Tomb Raider, and Wolfenstein. The PS4 versions always sell substantially better. Driveclub is coming up. Other games like Samurai Warriors 4, Guilty Gears, Warrors Orochi 3, and more are coming later this year.
Repeating "X1 is very close" a quadrillion times won't make your arguments right. After how many weeks, you still haven't provided a single piece of persuasive evidence.
I know what percentage represents, but what you fail to understand is that 45 % is still close to 55 % regardless of the quantity it repsents, that's what percent are used for, not to represent an actual number quantity.
1 % can represent a small or humongous quantity, but it's undeniable that it also represents 1/100.
Hence 45 % can represent as you have said 45 or 45 * 10 ^6, but the truth is still that 45 % is close to 55 % regardless of the actual difference between them, it's the percentage difference that matters.
If during all this generation X1 maintains close to 45 % marketshare, nobody can claim that PS4 dominated US, it will always remain a close battle.