Finding the Fourth Proportional to 16,039.88, 22,131.30 and 9,321.56

Step by Step Solution

1. Step 1: Write the proportion equation
   16,039.88 : 22,131.30 = 9,321.56 : x
2. Step 2: Convert to fraction form
   16,039.88/22,131.30 = 9,321.56/x
3. Step 3: Cross multiply
   16,039.88x = 22,131.30 × 9,321.56
4. Step 4: Simplify right side
   16,039.88x = 206,298,240.83
5. Step 5: Solve for x
   x = 206,298,240.83/16,039.88
6. Step 6: Final answer
   x = 12,861.58