Finding the Fourth Proportional to 16,388.72, 22,616.80 and 9,676

Step by Step Solution

1. Step 1: Write the proportion equation
   16,388.72 : 22,616.80 = 9,676 : x
2. Step 2: Convert to fraction form
   16,388.72/22,616.80 = 9,676/x
3. Step 3: Cross multiply
   16,388.72x = 22,616.80 × 9,676
4. Step 4: Simplify right side
   16,388.72x = 218,840,156.80
5. Step 5: Solve for x
   x = 218,840,156.80/16,388.72
6. Step 6: Final answer
   x = 13,353.10