Finding the Fourth Proportional to 99,602.71, 137,446.84 and 54,280.56

Step by Step Solution

1. Step 1: Write the proportion equation
   99,602.71 : 137,446.84 = 54,280.56 : x
2. Step 2: Convert to fraction form
   99,602.71/137,446.84 = 54,280.56/x
3. Step 3: Cross multiply
   99,602.71x = 137,446.84 × 54,280.56
4. Step 4: Simplify right side
   99,602.71x = 7,460,691,445.43
5. Step 5: Solve for x
   x = 7,460,691,445.43/99,602.71
6. Step 6: Final answer
   x = 74,904.50