Finding the Fourth Proportional to 22,685.60, 31,302.48 and 12,613.92

Step by Step Solution

1. Step 1: Write the proportion equation
   22,685.60 : 31,302.48 = 12,613.92 : x
2. Step 2: Convert to fraction form
   22,685.60/31,302.48 = 12,613.92/x
3. Step 3: Cross multiply
   22,685.60x = 31,302.48 × 12,613.92
4. Step 4: Simplify right side
   22,685.60x = 394,846,978.52
5. Step 5: Solve for x
   x = 394,846,978.52/22,685.60
6. Step 6: Final answer
   x = 17,405.18