Finding the Fourth Proportional to 22,290.21, 30,760.52 and 12,219.03

Step by Step Solution

1. Step 1: Write the proportion equation
   22,290.21 : 30,760.52 = 12,219.03 : x
2. Step 2: Convert to fraction form
   22,290.21/30,760.52 = 12,219.03/x
3. Step 3: Cross multiply
   22,290.21x = 30,760.52 × 12,219.03
4. Step 4: Simplify right side
   22,290.21x = 375,863,655.60
5. Step 5: Solve for x
   x = 375,863,655.60/22,290.21
6. Step 6: Final answer
   x = 16,862.28