Finding the Fourth Proportional to 22,250.28, 30,708.82 and 12,690.18

Step by Step Solution

1. Step 1: Write the proportion equation
   22,250.28 : 30,708.82 = 12,690.18 : x
2. Step 2: Convert to fraction form
   22,250.28/30,708.82 = 12,690.18/x
3. Step 3: Cross multiply
   22,250.28x = 30,708.82 × 12,690.18
4. Step 4: Simplify right side
   22,250.28x = 389,700,453.39
5. Step 5: Solve for x
   x = 389,700,453.39/22,250.28
6. Step 6: Final answer
   x = 17,514.41