Finding the Fourth Proportional to 22,681.62, 31,302.05 and 12,612.31

Step by Step Solution

1. Step 1: Write the proportion equation
   22,681.62 : 31,302.05 = 12,612.31 : x
2. Step 2: Convert to fraction form
   22,681.62/31,302.05 = 12,612.31/x
3. Step 3: Cross multiply
   22,681.62x = 31,302.05 × 12,612.31
4. Step 4: Simplify right side
   22,681.62x = 394,791,016.92
5. Step 5: Solve for x
   x = 394,791,016.92/22,681.62
6. Step 6: Final answer
   x = 17,405.77