Finding the Fourth Proportional to 12,434.96, 17,155.32 and 8,657.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,434.96 : 17,155.32 = 8,657.12 : x
2. Step 2: Convert to fraction form
   12,434.96/17,155.32 = 8,657.12/x
3. Step 3: Cross multiply
   12,434.96x = 17,155.32 × 8,657.12
4. Step 4: Simplify right side
   12,434.96x = 148,515,663.88
5. Step 5: Solve for x
   x = 148,515,663.88/12,434.96
6. Step 6: Final answer
   x = 11,943.40