Finding the Fourth Proportional to 99,472.50, 137,272.10 and 54,760.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,472.50 : 137,272.10 = 54,760.50 : x
2. Step 2: Convert to fraction form
   99,472.50/137,272.10 = 54,760.50/x
3. Step 3: Cross multiply
   99,472.50x = 137,272.10 × 54,760.50
4. Step 4: Simplify right side
   99,472.50x = 7,517,088,558.25
5. Step 5: Solve for x
   x = 7,517,088,558.25/99,472.50
6. Step 6: Final answer
   x = 75,569.51