Finding the Fourth Proportional to 12,560.78, 17,330.33 and 8,087.12

Step by Step Solution

1. Step 1: Write the proportion equation
   12,560.78 : 17,330.33 = 8,087.12 : x
2. Step 2: Convert to fraction form
   12,560.78/17,330.33 = 8,087.12/x
3. Step 3: Cross multiply
   12,560.78x = 17,330.33 × 8,087.12
4. Step 4: Simplify right side
   12,560.78x = 140,152,508.90
5. Step 5: Solve for x
   x = 140,152,508.90/12,560.78
6. Step 6: Final answer
   x = 11,157.94