Thanks for the info, guys!  Poser 12 runs on ARM-based Mac systems via Rosetta, so I'm looking into the possibility of downloading a Mac virtualization program, installing Rosetta on it, and trying to run the Poser installer in that.  Any prognosis on my chances of success?

Another alternative I'm looking at is just buying an Intel CPU like this and paying a local repair service to swap it into my tablet.  I'm not sure if it'll fit, though.