Finding the Fourth Proportional to 22,520.96, 31,078.32 and 12,311.59

Step by Step Solution

1. Step 1: Write the proportion equation
   22,520.96 : 31,078.32 = 12,311.59 : x
2. Step 2: Convert to fraction form
   22,520.96/31,078.32 = 12,311.59/x
3. Step 3: Cross multiply
   22,520.96x = 31,078.32 × 12,311.59
4. Step 4: Simplify right side
   22,520.96x = 382,623,533.73
5. Step 5: Solve for x
   x = 382,623,533.73/22,520.96
6. Step 6: Final answer
   x = 16,989.66