Finding the Fourth Proportional to 16,105.57, 24,159.11 and 13,289.18

Step by Step Solution

1. Step 1: Write the proportion equation
   16,105.57 : 24,159.11 = 13,289.18 : x
2. Step 2: Convert to fraction form
   16,105.57/24,159.11 = 13,289.18/x
3. Step 3: Cross multiply
   16,105.57x = 24,159.11 × 13,289.18
4. Step 4: Simplify right side
   16,105.57x = 321,054,761.43
5. Step 5: Solve for x
   x = 321,054,761.43/16,105.57
6. Step 6: Final answer
   x = 19,934.39