Finding the Fourth Proportional to 16,399.74, 22,629.55 and 9,326.31

Step by Step Solution

1. Step 1: Write the proportion equation
   16,399.74 : 22,629.55 = 9,326.31 : x
2. Step 2: Convert to fraction form
   16,399.74/22,629.55 = 9,326.31/x
3. Step 3: Cross multiply
   16,399.74x = 22,629.55 × 9,326.31
4. Step 4: Simplify right side
   16,399.74x = 211,050,198.46
5. Step 5: Solve for x
   x = 211,050,198.46/16,399.74
6. Step 6: Final answer
   x = 12,869.12