Finding the Fourth Proportional to 22,520.60, 31,078.42 and 12,584.60

Step by Step Solution

1. Step 1: Write the proportion equation
   22,520.60 : 31,078.42 = 12,584.60 : x
2. Step 2: Convert to fraction form
   22,520.60/31,078.42 = 12,584.60/x
3. Step 3: Cross multiply
   22,520.60x = 31,078.42 × 12,584.60
4. Step 4: Simplify right side
   22,520.60x = 391,109,484.33
5. Step 5: Solve for x
   x = 391,109,484.33/22,520.60
6. Step 6: Final answer
   x = 17,366.74