Finding the Fourth Proportional to 99,317.08, 137,086.66 and 59,059.20

Step by Step Solution

1. Step 1: Write the proportion equation
   99,317.08 : 137,086.66 = 59,059.20 : x
2. Step 2: Convert to fraction form
   99,317.08/137,086.66 = 59,059.20/x
3. Step 3: Cross multiply
   99,317.08x = 137,086.66 × 59,059.20
4. Step 4: Simplify right side
   99,317.08x = 8,096,228,470.27
5. Step 5: Solve for x
   x = 8,096,228,470.27/99,317.08
6. Step 6: Final answer
   x = 81,518.99