Finding the Fourth Proportional to 99,401.60, 137,121.93 and 59,086.69

Step by Step Solution

1. Step 1: Write the proportion equation
   99,401.60 : 137,121.93 = 59,086.69 : x
2. Step 2: Convert to fraction form
   99,401.60/137,121.93 = 59,086.69/x
3. Step 3: Cross multiply
   99,401.60x = 137,121.93 × 59,086.69
4. Step 4: Simplify right side
   99,401.60x = 8,102,080,627.31
5. Step 5: Solve for x
   x = 8,102,080,627.31/99,401.60
6. Step 6: Final answer
   x = 81,508.55