Finding the Fourth Proportional to 22,752.81, 31,401.42 and 12,682.17

Step by Step Solution

1. Step 1: Write the proportion equation
   22,752.81 : 31,401.42 = 12,682.17 : x
2. Step 2: Convert to fraction form
   22,752.81/31,401.42 = 12,682.17/x
3. Step 3: Cross multiply
   22,752.81x = 31,401.42 × 12,682.17
4. Step 4: Simplify right side
   22,752.81x = 398,238,146.68
5. Step 5: Solve for x
   x = 398,238,146.68/22,752.81
6. Step 6: Final answer
   x = 17,502.81