I am on a PC. Is it possible to render my CS6 project in Quicktime ProRes 1920x1080 full HD
Practically and legally...no. Apple has not made it available on the PC platform.
But you can render it to another widely accepted boradcast standard..DNxHD by Avid.
Avid Codecs LE v2.2.1 Installer PC
See e.g. this Telestream webpage about encoding to ProRes on Windows.
See this Forum thread on how to encode to ProRes on Windows via FFmpeg or FFmbc.