Finding the Fourth Proportional to 16,320.72, 24,477.38 and 7,992.40

Step by Step Solution

1. Step 1: Write the proportion equation
   16,320.72 : 24,477.38 = 7,992.40 : x
2. Step 2: Convert to fraction form
   16,320.72/24,477.38 = 7,992.40/x
3. Step 3: Cross multiply
   16,320.72x = 24,477.38 × 7,992.40
4. Step 4: Simplify right side
   16,320.72x = 195,633,011.91
5. Step 5: Solve for x
   x = 195,633,011.91/16,320.72
6. Step 6: Final answer
   x = 11,986.79