Finding the Fourth Proportional to 99,747.50, 137,651.55 and 55,035.50

Step by Step Solution

1. Step 1: Write the proportion equation
   99,747.50 : 137,651.55 = 55,035.50 : x
2. Step 2: Convert to fraction form
   99,747.50/137,651.55 = 55,035.50/x
3. Step 3: Cross multiply
   99,747.50x = 137,651.55 × 55,035.50
4. Step 4: Simplify right side
   99,747.50x = 7,575,721,880.03
5. Step 5: Solve for x
   x = 7,575,721,880.03/99,747.50
6. Step 6: Final answer
   x = 75,948.99