Finding the Fourth Proportional to 16,640.16, 22,958.92 and 9,922.72

Step by Step Solution

1. Step 1: Write the proportion equation
   16,640.16 : 22,958.92 = 9,922.72 : x
2. Step 2: Convert to fraction form
   16,640.16/22,958.92 = 9,922.72/x
3. Step 3: Cross multiply
   16,640.16x = 22,958.92 × 9,922.72
4. Step 4: Simplify right side
   16,640.16x = 227,814,934.66
5. Step 5: Solve for x
   x = 227,814,934.66/16,640.16
6. Step 6: Final answer
   x = 13,690.67