Finding the Fourth Proportional to 8,326.56, 12,429.10 and 7,275.61

Step by Step Solution

1. Step 1: Write the proportion equation
   8,326.56 : 12,429.10 = 7,275.61 : x
2. Step 2: Convert to fraction form
   8,326.56/12,429.10 = 7,275.61/x
3. Step 3: Cross multiply
   8,326.56x = 12,429.10 × 7,275.61
4. Step 4: Simplify right side
   8,326.56x = 90,429,185.73
5. Step 5: Solve for x
   x = 90,429,185.73/8,326.56
6. Step 6: Final answer
   x = 10,860.33