I cant figure out what formula or order it has to be done in. Either I'm using the wrong formula or not doing the right steps. I keep getting wrong answers.

 

In order for the simulation to work, set a value of Ω for R3, nothing else.

Set a value for V for the battery.

 

In order for the simulation to work, set a value of Ω for R3, nothing else.

Set a value for V for the battery.

47.21²÷2310= 0.964841602 mW to W
R3 =964.84

 

47.21²÷2310= 0.964841602 mW to W
R3 =964.84

I got it. I think being sick is just giving me brain fog because I've successfully done it before, just couldn't seem to remember. Thank you very much