Is there any data on this?

I'm pretty confident the original/slim PS4 sells more but by how much?

4:1 (Slim:Pro) sales since launch of the PS4 Pro

Where is your source for this?

I found this article but its only for December 2016
http://www.playstationlifestyle.net/2017/01/19/report-ps4-pro-sold-238000-units-us-last-month/

Sony have said more than 1 out of 5 consoles sold, since the Pro launch, have been PS4pro's.

So if the PS4 has done 7m+ WW in 2017, that means this year (jan 1st -> june 11th) its done about 1,4m+ units of PS4pro.

Naturally the PS4pro has been out longer (it released early in september 2016 *edit: that was just the reveal, launch was November).

How much exactly has the PS4pro done? not sure.

However as of the end of september 2016 PS4 was at 47.4m, and now its over 60,4m

If we assume the same 1 out of 5 aspect, then probably around  2m? abit more than 2.6m, maybe upwards of 3m or so.

Just a educated guess, but probably around 2.6m-3m units of PS4pro's out there.

Compaired to the ~57.4m or so normal PS4/PS4slims.

For a combined total of PS4 sales of 60.4m+ (as of june 11th).

edited it, had launch date wrong.

No, the Pro launched November 10th, not early September.

Oh...crap your right, september was the announcement, and november the launch.

But more then 1 million is certain, right?

20% of sales since release have been Pro.

VGC has PS4 at 47m on Nov 12th, Sony just told us PS4 is at 60.4m.

Pro has sold around 2.6m

Gotta be atleast 2mil of them out there, probably more.

Id say 2m is a certainty.

1.5 million then? :P