Finding the Fourth Proportional to 12,876.32, 17,766.12 and 8,158.88

Step by Step Solution

1. Step 1: Write the proportion equation
   12,876.32 : 17,766.12 = 8,158.88 : x
2. Step 2: Convert to fraction form
   12,876.32/17,766.12 = 8,158.88/x
3. Step 3: Cross multiply
   12,876.32x = 17,766.12 × 8,158.88
4. Step 4: Simplify right side
   12,876.32x = 144,951,641.15
5. Step 5: Solve for x
   x = 144,951,641.15/12,876.32
6. Step 6: Final answer
   x = 11,257.23