Finding the Fourth Proportional to 82,732.80, 123,807.60 and 57,655.20

Step by Step Solution

1. Step 1: Write the proportion equation
   82,732.80 : 123,807.60 = 57,655.20 : x
2. Step 2: Convert to fraction form
   82,732.80/123,807.60 = 57,655.20/x
3. Step 3: Cross multiply
   82,732.80x = 123,807.60 × 57,655.20
4. Step 4: Simplify right side
   82,732.80x = 7,138,151,939.52
5. Step 5: Solve for x
   x = 7,138,151,939.52/82,732.80
6. Step 6: Final answer
   x = 86,279.59