Finding the Fourth Proportional to 22,217.82, 30,668.31 and 12,790.14

Step by Step Solution

1. Step 1: Write the proportion equation
   22,217.82 : 30,668.31 = 12,790.14 : x
2. Step 2: Convert to fraction form
   22,217.82/30,668.31 = 12,790.14/x
3. Step 3: Cross multiply
   22,217.82x = 30,668.31 × 12,790.14
4. Step 4: Simplify right side
   22,217.82x = 392,251,978.46
5. Step 5: Solve for x
   x = 392,251,978.46/22,217.82
6. Step 6: Final answer
   x = 17,654.84