Finding the Fourth Proportional to 8,401.72, 12,607.38 and 8,382.04

Step by Step Solution

1. Step 1: Write the proportion equation
   8,401.72 : 12,607.38 = 8,382.04 : x
2. Step 2: Convert to fraction form
   8,401.72/12,607.38 = 8,382.04/x
3. Step 3: Cross multiply
   8,401.72x = 12,607.38 × 8,382.04
4. Step 4: Simplify right side
   8,401.72x = 105,675,563.46
5. Step 5: Solve for x
   x = 105,675,563.46/8,401.72
6. Step 6: Final answer
   x = 12,577.85