Finding the Fourth Proportional to 22,581.50, 31,162.50 and 12,645.50

Step by Step Solution

1. Step 1: Write the proportion equation
   22,581.50 : 31,162.50 = 12,645.50 : x
2. Step 2: Convert to fraction form
   22,581.50/31,162.50 = 12,645.50/x
3. Step 3: Cross multiply
   22,581.50x = 31,162.50 × 12,645.50
4. Step 4: Simplify right side
   22,581.50x = 394,065,393.75
5. Step 5: Solve for x
   x = 394,065,393.75/22,581.50
6. Step 6: Final answer
   x = 17,450.81