Finding the Fourth Proportional to 8,326.53, 12,429.05 and 7,275.57

Step by Step Solution

1. Step 1: Write the proportion equation
   8,326.53 : 12,429.05 = 7,275.57 : x
2. Step 2: Convert to fraction form
   8,326.53/12,429.05 = 7,275.57/x
3. Step 3: Cross multiply
   8,326.53x = 12,429.05 × 7,275.57
4. Step 4: Simplify right side
   8,326.53x = 90,428,441.50
5. Step 5: Solve for x
   x = 90,428,441.50/8,326.53
6. Step 6: Final answer
   x = 10,860.28