Finding the Fourth Proportional to 11,129.59, 15,359.57 and 6,414.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,129.59 : 15,359.57 = 6,414.18 : x
2. Step 2: Convert to fraction form
   11,129.59/15,359.57 = 6,414.18/x
3. Step 3: Cross multiply
   11,129.59x = 15,359.57 × 6,414.18
4. Step 4: Simplify right side
   11,129.59x = 98,519,046.70
5. Step 5: Solve for x
   x = 98,519,046.70/11,129.59
6. Step 6: Final answer
   x = 8,851.99