Finding the Fourth Proportional to 12,259.31, 16,915.50 and 8,476.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,259.31 : 16,915.50 = 8,476.61 : x
2. Step 2: Convert to fraction form
   12,259.31/16,915.50 = 8,476.61/x
3. Step 3: Cross multiply
   12,259.31x = 16,915.50 × 8,476.61
4. Step 4: Simplify right side
   12,259.31x = 143,386,011.88
5. Step 5: Solve for x
   x = 143,386,011.88/12,259.31
6. Step 6: Final answer
   x = 11,696.10