The already-powerful company aims to bulk up even more through acquisitions.Performance Food Group's (PFGC 1.20%) shares were performing very well over the past few trading sessions, to the point where they were up by nearly 12% in price week to date as of early Friday morning. That's according to data compiled by S&P Global Market Intelligence. The main reason why wasn't exactly a mystery -- the comestibles company posted a very encouraging quarterly earnings report.A convincing earnings beatPerformance se ...