Finding the Fourth Proportional to 22,818.81, 31,489.96 and 12,882.81

Step by Step Solution

1. Step 1: Write the proportion equation
   22,818.81 : 31,489.96 = 12,882.81 : x
2. Step 2: Convert to fraction form
   22,818.81/31,489.96 = 12,882.81/x
3. Step 3: Cross multiply
   22,818.81x = 31,489.96 × 12,882.81
4. Step 4: Simplify right side
   22,818.81x = 405,679,171.59
5. Step 5: Solve for x
   x = 405,679,171.59/22,818.81
6. Step 6: Final answer
   x = 17,778.28