Finding the Fourth Proportional to 22,636.89, 31,235.57 and 12,565.40

Step by Step Solution

1. Step 1: Write the proportion equation
   22,636.89 : 31,235.57 = 12,565.40 : x
2. Step 2: Convert to fraction form
   22,636.89/31,235.57 = 12,565.40/x
3. Step 3: Cross multiply
   22,636.89x = 31,235.57 × 12,565.40
4. Step 4: Simplify right side
   22,636.89x = 392,487,212.27
5. Step 5: Solve for x
   x = 392,487,212.27/22,636.89
6. Step 6: Final answer
   x = 17,338.39