Finding the Fourth Proportional to 16,057.87, 22,159.20 and 8,789.91

Step by Step Solution

1. Step 1: Write the proportion equation
   16,057.87 : 22,159.20 = 8,789.91 : x
2. Step 2: Convert to fraction form
   16,057.87/22,159.20 = 8,789.91/x
3. Step 3: Cross multiply
   16,057.87x = 22,159.20 × 8,789.91
4. Step 4: Simplify right side
   16,057.87x = 194,777,329.72
5. Step 5: Solve for x
   x = 194,777,329.72/16,057.87
6. Step 6: Final answer
   x = 12,129.71