Solving series-parallel circuits

[LR5]

Summary:: Solving series-parallel circuits using current and voltage divider rule

For the attached circuit, I need to determine the voltage drop across R4 using the voltage divider rule.
So far, I have determined total resistance to be R = 383Ω, total current I = 0.03A, and I3 = 0.023A.
I think these are correct.
I then get V through R1 and R2 to be 2.97V, therefore V for the rest of the circuit is 9.03V. Then the voltage for AB should be 9.03V.
Then V for R4 and R5 would be V ab (R45/(R45 + R3) = 9.03 x (41/371) = 1V.
I'm not sure if my methods and calculations are correct as this is very confusing

 

[phinds]

I'm not sure if my methods and calculations are correct as this is very confusing

How would we know if you are correct, as you show no work on getting the resistance? Show ALL the work used in reducing the circuit, step by step.