Finding the Fourth Proportional to 16,021.88, 22,078.69 and 12,249.31

Step by Step Solution

1. Step 1: Write the proportion equation
   16,021.88 : 22,078.69 = 12,249.31 : x
2. Step 2: Convert to fraction form
   16,021.88/22,078.69 = 12,249.31/x
3. Step 3: Cross multiply
   16,021.88x = 22,078.69 × 12,249.31
4. Step 4: Simplify right side
   16,021.88x = 270,448,718.20
5. Step 5: Solve for x
   x = 270,448,718.20/16,021.88
6. Step 6: Final answer
   x = 16,879.96