Finding the Fourth Proportional to 81,057.28, 111,770.88 and 52,710.40

Step by Step Solution

1. Step 1: Write the proportion equation
   81,057.28 : 111,770.88 = 52,710.40 : x
2. Step 2: Convert to fraction form
   81,057.28/111,770.88 = 52,710.40/x
3. Step 3: Cross multiply
   81,057.28x = 111,770.88 × 52,710.40
4. Step 4: Simplify right side
   81,057.28x = 5,891,487,793.15
5. Step 5: Solve for x
   x = 5,891,487,793.15/81,057.28
6. Step 6: Final answer
   x = 72,683.02