Finding the Fourth Proportional to 12,414.52, 17,115.27 and 8,428.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,414.52 : 17,115.27 = 8,428.72 : x
2. Step 2: Convert to fraction form
   12,414.52/17,115.27 = 8,428.72/x
3. Step 3: Cross multiply
   12,414.52x = 17,115.27 × 8,428.72
4. Step 4: Simplify right side
   12,414.52x = 144,259,799.23
5. Step 5: Solve for x
   x = 144,259,799.23/12,414.52
6. Step 6: Final answer
   x = 11,620.24