Finding the Fourth Proportional to 57,761.50, 86,663.72 and 35,318.15

Step by Step Solution

1. Step 1: Write the proportion equation
   57,761.50 : 86,663.72 = 35,318.15 : x
2. Step 2: Convert to fraction form
   57,761.50/86,663.72 = 35,318.15/x
3. Step 3: Cross multiply
   57,761.50x = 86,663.72 × 35,318.15
4. Step 4: Simplify right side
   57,761.50x = 3,060,802,262.52
5. Step 5: Solve for x
   x = 3,060,802,262.52/57,761.50
6. Step 6: Final answer
   x = 52,990.35