Distribution of a 28.8MHz clock to 4 circuits
A dedicated clock buffer IC is the most reliable method at the frequency you have. I have used IDT's before. Have a look at the IDT74FCT3807/A, a 1-in 10-out device for a quid.

Inherent in your question is that you'd be putting this on a PCB rather than a breadboard. The latter would give you such skew problems that you might as well put the clock into the inputs of a 74-series hex inverter and take your clocks off its outputs.

Follow the standard good PCB design guidelines for distributing your clocks. Make sure that the tracks are over a ground plane and of similar length (+/-10% or better). Put a series resistor (e.g. 22 ohm but look into this) between the incoming clock and each dongle at the point closest to the load.

But the same is true of the other signals communicating with these dongles. You're working hard to get everything's clocks close to truly synchronised here. You need to ensure that other signals between these devices are of suitable quality and layout. It's hard to detail further on that without knowing more about your application.