Need to paraphrase this but there's a semantic ambiguity (could mean "show that much of corporate America has" or could mean "reveal the amount of corporate America that has"):
Chapter 5 will show how much of corporate America has come to emulate banking—how we’re all glorified bankers now—by tracking the history of General Electric, which is one of the great American innovators, but which became the country’s fifth-largest bank before trying to reclaim its roots in industry.
