You can't run Logic Pro X on a PC (to answer your question). But, there are many DAWs you can choose from that are pretty good alternatives. The DAW ultimately depends on how comfortable you feel with it (e.g. I tried Ableton, Garageband, Logic Pro 9 & X and FL Studio... I don't know how to make a single sound or let alone hear one on ableton, FL Studio is confusing to me.. I get along better with Garageband and Logic Pro, but that's just me)
...and to the guy that says "Apple plugins are so cheap and computers are so expensive". You're kinda true in the sense that Apple sells software for cheap to nothing, while their devices are expensive. You gotta remember, Apple's job is to sell devices, but just because they sell software for cheap doesn't mean it's inferior in anyway.
Apple used to sell Logic Pro for $500-$1000 (I remember) and that did not include Apple's expansion packs (which is now free with Logic Pro X and Garageband and in higher quality... you can literally make music out the box without purchasing additional plugins.. except their orchestra is decent, but good for being out the box in a DAW)
I've had my mac around for around 4 years, and I'll just tell you again... cheap software, when it comes to Apple, does not mean inferior. I've used both Macs and PCs and PERSONALLY, I prefer Macs by a long shot.
Of course, this is my OWN PERSONAL opinion.
Make a decision that's right for you.