Finding the Fourth Proportional to 64,582.31, 89,167.07 and 57,755.15

Step by Step Solution

1. Step 1: Write the proportion equation
   64,582.31 : 89,167.07 = 57,755.15 : x
2. Step 2: Convert to fraction form
   64,582.31/89,167.07 = 57,755.15/x
3. Step 3: Cross multiply
   64,582.31x = 89,167.07 × 57,755.15
4. Step 4: Simplify right side
   64,582.31x = 5,149,856,768.30
5. Step 5: Solve for x
   x = 5,149,856,768.30/64,582.31
6. Step 6: Final answer
   x = 79,740.99