Finding the Fourth Proportional to 8,469.24, 12,647.55 and 8,377.71

Step by Step Solution

1. Step 1: Write the proportion equation
   8,469.24 : 12,647.55 = 8,377.71 : x
2. Step 2: Convert to fraction form
   8,469.24/12,647.55 = 8,377.71/x
3. Step 3: Cross multiply
   8,469.24x = 12,647.55 × 8,377.71
4. Step 4: Simplify right side
   8,469.24x = 105,957,506.11
5. Step 5: Solve for x
   x = 105,957,506.11/8,469.24
6. Step 6: Final answer
   x = 12,510.86