Finding the Fourth Proportional to 99,791.85, 137,711.61 and 54,469.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,791.85 : 137,711.61 = 54,469.50 : x
2. Step 2: Convert to fraction form
   99,791.85/137,711.61 = 54,469.50/x
3. Step 3: Cross multiply
   99,791.85x = 137,711.61 × 54,469.50
4. Step 4: Simplify right side
   99,791.85x = 7,501,082,540.90
5. Step 5: Solve for x
   x = 7,501,082,540.90/99,791.85
6. Step 6: Final answer
   x = 75,167.29