Finding the Fourth Proportional to 16,380.72, 22,601.52 and 9,664.20

Step by Step Solution

1. Step 1: Write the proportion equation
   16,380.72 : 22,601.52 = 9,664.20 : x
2. Step 2: Convert to fraction form
   16,380.72/22,601.52 = 9,664.20/x
3. Step 3: Cross multiply
   16,380.72x = 22,601.52 × 9,664.20
4. Step 4: Simplify right side
   16,380.72x = 218,425,609.58
5. Step 5: Solve for x
   x = 218,425,609.58/16,380.72
6. Step 6: Final answer
   x = 13,334.31