Finding the Fourth Proportional to 12,634.88, 17,414.72 and 8,859.20

Step by Step Solution

1. Step 1: Write the proportion equation
   12,634.88 : 17,414.72 = 8,859.20 : x
2. Step 2: Convert to fraction form
   12,634.88/17,414.72 = 8,859.20/x
3. Step 3: Cross multiply
   12,634.88x = 17,414.72 × 8,859.20
4. Step 4: Simplify right side
   12,634.88x = 154,280,487.42
5. Step 5: Solve for x
   x = 154,280,487.42/12,634.88
6. Step 6: Final answer
   x = 12,210.68