Finding the Fourth Proportional to 11,114.88, 15,330.24 and 8,142.72

Step by Step Solution

1. Step 1: Write the proportion equation
   11,114.88 : 15,330.24 = 8,142.72 : x
2. Step 2: Convert to fraction form
   11,114.88/15,330.24 = 8,142.72/x
3. Step 3: Cross multiply
   11,114.88x = 15,330.24 × 8,142.72
4. Step 4: Simplify right side
   11,114.88x = 124,829,851.85
5. Step 5: Solve for x
   x = 124,829,851.85/11,114.88
6. Step 6: Final answer
   x = 11,230.88