Finding the Fourth Proportional to 22,520.50, 31,078.29 and 12,586.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,520.50 : 31,078.29 = 12,586.42 : x
2. Step 2: Convert to fraction form
   22,520.50/31,078.29 = 12,586.42/x
3. Step 3: Cross multiply
   22,520.50x = 31,078.29 × 12,586.42
4. Step 4: Simplify right side
   22,520.50x = 391,164,410.82
5. Step 5: Solve for x
   x = 391,164,410.82/22,520.50
6. Step 6: Final answer
   x = 17,369.26