Finding the Fourth Proportional to 8,565.31, 12,829.39 and 8,356.24

Step by Step Solution

1. Step 1: Write the proportion equation
   8,565.31 : 12,829.39 = 8,356.24 : x
2. Step 2: Convert to fraction form
   8,565.31/12,829.39 = 8,356.24/x
3. Step 3: Cross multiply
   8,565.31x = 12,829.39 × 8,356.24
4. Step 4: Simplify right side
   8,565.31x = 107,205,461.89
5. Step 5: Solve for x
   x = 107,205,461.89/8,565.31
6. Step 6: Final answer
   x = 12,516.24