Finding the Fourth Proportional to 22,290.61, 30,760.92 and 12,219.48

Step by Step Solution

1. Step 1: Write the proportion equation
   22,290.61 : 30,760.92 = 12,219.48 : x
2. Step 2: Convert to fraction form
   22,290.61/30,760.92 = 12,219.48/x
3. Step 3: Cross multiply
   22,290.61x = 30,760.92 × 12,219.48
4. Step 4: Simplify right side
   22,290.61x = 375,882,446.72
5. Step 5: Solve for x
   x = 375,882,446.72/22,290.61
6. Step 6: Final answer
   x = 16,862.82