Finding the Fourth Proportional to 22,290.14, 30,760.76 and 12,219.55

Step by Step Solution

1. Step 1: Write the proportion equation
   22,290.14 : 30,760.76 = 12,219.55 : x
2. Step 2: Convert to fraction form
   22,290.14/30,760.76 = 12,219.55/x
3. Step 3: Cross multiply
   22,290.14x = 30,760.76 × 12,219.55
4. Step 4: Simplify right side
   22,290.14x = 375,882,644.86
5. Step 5: Solve for x
   x = 375,882,644.86/22,290.14
6. Step 6: Final answer
   x = 16,863.18