Finding the Fourth Proportional to 16,234.72, 22,400.40 and 9,520.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,234.72 : 22,400.40 = 9,520.72 : x
2. Step 2: Convert to fraction form
   16,234.72/22,400.40 = 9,520.72/x
3. Step 3: Cross multiply
   16,234.72x = 22,400.40 × 9,520.72
4. Step 4: Simplify right side
   16,234.72x = 213,267,936.29
5. Step 5: Solve for x
   x = 213,267,936.29/16,234.72
6. Step 6: Final answer
   x = 13,136.53