Finding the Fourth Proportional to 99,562.72, 137,401.68 and 54,850.72

Step by Step Solution

1. Step 1: Write the proportion equation
   99,562.72 : 137,401.68 = 54,850.72 : x
2. Step 2: Convert to fraction form
   99,562.72/137,401.68 = 54,850.72/x
3. Step 3: Cross multiply
   99,562.72x = 137,401.68 × 54,850.72
4. Step 4: Simplify right side
   99,562.72x = 7,536,581,077.21
5. Step 5: Solve for x
   x = 7,536,581,077.21/99,562.72
6. Step 6: Final answer
   x = 75,696.82