Finding the Fourth Proportional to 99,493.46, 137,296.38 and 54,171.30

Step by Step Solution

1. Step 1: Write the proportion equation
   99,493.46 : 137,296.38 = 54,171.30 : x
2. Step 2: Convert to fraction form
   99,493.46/137,296.38 = 54,171.30/x
3. Step 3: Cross multiply
   99,493.46x = 137,296.38 × 54,171.30
4. Step 4: Simplify right side
   99,493.46x = 7,437,523,389.89
5. Step 5: Solve for x
   x = 7,437,523,389.89/99,493.46
6. Step 6: Final answer
   x = 74,753.89