Finding the Fourth Proportional to 16,426.72, 24,644.40 and 7,657.12

Step by Step Solution

1. Step 1: Write the proportion equation
   16,426.72 : 24,644.40 = 7,657.12 : x
2. Step 2: Convert to fraction form
   16,426.72/24,644.40 = 7,657.12/x
3. Step 3: Cross multiply
   16,426.72x = 24,644.40 × 7,657.12
4. Step 4: Simplify right side
   16,426.72x = 188,705,128.13
5. Step 5: Solve for x
   x = 188,705,128.13/16,426.72
6. Step 6: Final answer
   x = 11,487.69