Finding the Fourth Proportional to 12,411.72, 17,132.58 and 8,221.32

Step by Step Solution

1. Step 1: Write the proportion equation
   12,411.72 : 17,132.58 = 8,221.32 : x
2. Step 2: Convert to fraction form
   12,411.72/17,132.58 = 8,221.32/x
3. Step 3: Cross multiply
   12,411.72x = 17,132.58 × 8,221.32
4. Step 4: Simplify right side
   12,411.72x = 140,852,422.61
5. Step 5: Solve for x
   x = 140,852,422.61/12,411.72
6. Step 6: Final answer
   x = 11,348.34