Finding the Fourth Proportional to 8,661.72, 11,949.90 and 5,474.10

Step by Step Solution

1. Step 1: Write the proportion equation
   8,661.72 : 11,949.90 = 5,474.10 : x
2. Step 2: Convert to fraction form
   8,661.72/11,949.90 = 5,474.10/x
3. Step 3: Cross multiply
   8,661.72x = 11,949.90 × 5,474.10
4. Step 4: Simplify right side
   8,661.72x = 65,414,947.59
5. Step 5: Solve for x
   x = 65,414,947.59/8,661.72
6. Step 6: Final answer
   x = 7,552.19