Finding the Fourth Proportional to 123,761.38, 185,612.33 and 57,137.50

Step by Step Solution

1. Step 1: Write the proportion equation
   123,761.38 : 185,612.33 = 57,137.50 : x
2. Step 2: Convert to fraction form
   123,761.38/185,612.33 = 57,137.50/x
3. Step 3: Cross multiply
   123,761.38x = 185,612.33 × 57,137.50
4. Step 4: Simplify right side
   123,761.38x = 10,605,423,291.63
5. Step 5: Solve for x
   x = 10,605,423,291.63/123,761.38
6. Step 6: Final answer
   x = 85,692.51