Finding the Fourth Proportional to 22,290.42, 30,760.50 and 12,218.74

Step by Step Solution

1. Step 1: Write the proportion equation
   22,290.42 : 30,760.50 = 12,218.74 : x
2. Step 2: Convert to fraction form
   22,290.42/30,760.50 = 12,218.74/x
3. Step 3: Cross multiply
   22,290.42x = 30,760.50 × 12,218.74
4. Step 4: Simplify right side
   22,290.42x = 375,854,551.77
5. Step 5: Solve for x
   x = 375,854,551.77/22,290.42
6. Step 6: Final answer
   x = 16,861.71