Finding the Fourth Proportional to 9,049.30, 12,491.49 and 8,799.61

Step by Step Solution

1. Step 1: Write the proportion equation
   9,049.30 : 12,491.49 = 8,799.61 : x
2. Step 2: Convert to fraction form
   9,049.30/12,491.49 = 8,799.61/x
3. Step 3: Cross multiply
   9,049.30x = 12,491.49 × 8,799.61
4. Step 4: Simplify right side
   9,049.30x = 109,920,240.32
5. Step 5: Solve for x
   x = 109,920,240.32/9,049.30
6. Step 6: Final answer
   x = 12,146.82