Finding the Fourth Proportional to 82,689.57, 123,935.90 and 57,593.70

Step by Step Solution

1. Step 1: Write the proportion equation
   82,689.57 : 123,935.90 = 57,593.70 : x
2. Step 2: Convert to fraction form
   82,689.57/123,935.90 = 57,593.70/x
3. Step 3: Cross multiply
   82,689.57x = 123,935.90 × 57,593.70
4. Step 4: Simplify right side
   82,689.57x = 7,137,926,755.86
5. Step 5: Solve for x
   x = 7,137,926,755.86/82,689.57
6. Step 6: Final answer
   x = 86,321.97