Finding the Fourth Proportional to 99,743,587.91, 137,644,847.60 and 55,691,336.55

Step by Step Solution

1. Step 1: Write the proportion equation
   99,743,587.91 : 137,644,847.60 = 55,691,336.55 : x
2. Step 2: Convert to fraction form
   99,743,587.91/137,644,847.60 = 55,691,336.55/x
3. Step 3: Cross multiply
   99,743,587.91x = 137,644,847.60 × 55,691,336.55
4. Step 4: Simplify right side
   99,743,587.91x = 7,665,625,532,065,059
5. Step 5: Solve for x
   x = 7,665,625,532,065,059/99,743,587.91
6. Step 6: Final answer
   x = 76,853,316.52