Finding the Fourth Proportional to 22,210.20, 30,650.50 and 12,139.07

Step by Step Solution

1. Step 1: Write the proportion equation
   22,210.20 : 30,650.50 = 12,139.07 : x
2. Step 2: Convert to fraction form
   22,210.20/30,650.50 = 12,139.07/x
3. Step 3: Cross multiply
   22,210.20x = 30,650.50 × 12,139.07
4. Step 4: Simplify right side
   22,210.20x = 372,068,426.96
5. Step 5: Solve for x
   x = 372,068,426.96/22,210.20
6. Step 6: Final answer
   x = 16,752.14