Finding the Fourth Proportional to 16,100.20, 24,128.70 and 8,311.24

Step by Step Solution

1. Step 1: Write the proportion equation
   16,100.20 : 24,128.70 = 8,311.24 : x
2. Step 2: Convert to fraction form
   16,100.20/24,128.70 = 8,311.24/x
3. Step 3: Cross multiply
   16,100.20x = 24,128.70 × 8,311.24
4. Step 4: Simplify right side
   16,100.20x = 200,539,416.59
5. Step 5: Solve for x
   x = 200,539,416.59/16,100.20
6. Step 6: Final answer
   x = 12,455.71