This is definitely a custom lettering job, although I don't know who did it. A-list magazines like Fortune simply don't use mere fonts for their logos.
That said, there may be something similar available.
It's a bit like Nick Shinn's Beaufort, Romana (not counting the R), or even ITC Golden Cockerel, depending on how you look at it. But I don't know of anything that would come very close, weird though it seems.
Captured from web.archive.org on 18 May 2005. view this capture