Finding the Fourth Proportional to 22,139.50, 30,554.43 and 12,205.42

Step by Step Solution

1. Step 1: Write the proportion equation
   22,139.50 : 30,554.43 = 12,205.42 : x
2. Step 2: Convert to fraction form
   22,139.50/30,554.43 = 12,205.42/x
3. Step 3: Cross multiply
   22,139.50x = 30,554.43 × 12,205.42
4. Step 4: Simplify right side
   22,139.50x = 372,929,651.01
5. Step 5: Solve for x
   x = 372,929,651.01/22,139.50
6. Step 6: Final answer
   x = 16,844.54