Finding the Fourth Proportional to 22,708.42, 31,337.15 and 12,636.47

Step by Step Solution

1. Step 1: Write the proportion equation
   22,708.42 : 31,337.15 = 12,636.47 : x
2. Step 2: Convert to fraction form
   22,708.42/31,337.15 = 12,636.47/x
3. Step 3: Cross multiply
   22,708.42x = 31,337.15 × 12,636.47
4. Step 4: Simplify right side
   22,708.42x = 395,990,971.02
5. Step 5: Solve for x
   x = 395,990,971.02/22,708.42
6. Step 6: Final answer
   x = 17,438.07