Finding the Fourth Proportional to 105,732.71, 145,910.47 and 60,424.55

Step by Step Solution

1. Step 1: Write the proportion equation
   105,732.71 : 145,910.47 = 60,424.55 : x
2. Step 2: Convert to fraction form
   105,732.71/145,910.47 = 60,424.55/x
3. Step 3: Cross multiply
   105,732.71x = 145,910.47 × 60,424.55
4. Step 4: Simplify right side
   105,732.71x = 8,816,574,490.04
5. Step 5: Solve for x
   x = 8,816,574,490.04/105,732.71
6. Step 6: Final answer
   x = 83,385.50