Finding the Fourth Proportional to 8,650.72, 12,989.04 and 8,348.32

Step by Step Solution

1. Step 1: Write the proportion equation
   8,650.72 : 12,989.04 = 8,348.32 : x
2. Step 2: Convert to fraction form
   8,650.72/12,989.04 = 8,348.32/x
3. Step 3: Cross multiply
   8,650.72x = 12,989.04 × 8,348.32
4. Step 4: Simplify right side
   8,650.72x = 108,436,662.41
5. Step 5: Solve for x
   x = 108,436,662.41/8,650.72
6. Step 6: Final answer
   x = 12,534.99