Finding the Fourth Proportional to 8,552.43, 12,856.23 and 7,930.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,552.43 : 12,856.23 = 7,930.61 : x
2. Step 2: Convert to fraction form
   8,552.43/12,856.23 = 7,930.61/x
3. Step 3: Cross multiply
   8,552.43x = 12,856.23 × 7,930.61
4. Step 4: Simplify right side
   8,552.43x = 101,957,642.27
5. Step 5: Solve for x
   x = 101,957,642.27/8,552.43
6. Step 6: Final answer
   x = 11,921.49