Finding the Fourth Proportional to 123,581.30, 185,373.77 and 85,593.11

Step by Step Solution

1. Step 1: Write the proportion equation
   123,581.30 : 185,373.77 = 85,593.11 : x
2. Step 2: Convert to fraction form
   123,581.30/185,373.77 = 85,593.11/x
3. Step 3: Cross multiply
   123,581.30x = 185,373.77 × 85,593.11
4. Step 4: Simplify right side
   123,581.30x = 15,866,716,131.89
5. Step 5: Solve for x
   x = 15,866,716,131.89/123,581.30
6. Step 6: Final answer
   x = 128,390.92