My old Debian PowerPC only gets internet via a long ethernet cable run across my kitchen. Is it possible to connect the PC to my Raspberry Pi's ethernet port and use the internet via my Pi's WiFi dongle?

Raspberry Pi (Raspbian) has a powered hub and a USB WiFi dongle.

Debian PowerPC is an old Apple eMac, which hasn't worked with any USB WiFi receiver I've tried. If I want to connect to the internet, I run a long ethernet cable across my kitchen.

Instead of running the ethernet cable from the PC to the router, I'd like make an ethernet connection between the PC and the Raspberry Pi, which is connected to my home network via WiFi dongle. So the PC will access the internet through the Pi's wireless connection.