Finding the Fourth Proportional to 12,440.16, 17,166.96 and 8,909.28

Step by Step Solution

1. Step 1: Write the proportion equation
   12,440.16 : 17,166.96 = 8,909.28 : x
2. Step 2: Convert to fraction form
   12,440.16/17,166.96 = 8,909.28/x
3. Step 3: Cross multiply
   12,440.16x = 17,166.96 × 8,909.28
4. Step 4: Simplify right side
   12,440.16x = 152,945,253.39
5. Step 5: Solve for x
   x = 152,945,253.39/12,440.16
6. Step 6: Final answer
   x = 12,294.48