Finding the Fourth Proportional to 22,209.59, 30,649.17 and 12,138.03

Step by Step Solution

1. Step 1: Write the proportion equation
   22,209.59 : 30,649.17 = 12,138.03 : x
2. Step 2: Convert to fraction form
   22,209.59/30,649.17 = 12,138.03/x
3. Step 3: Cross multiply
   22,209.59x = 30,649.17 × 12,138.03
4. Step 4: Simplify right side
   22,209.59x = 372,020,507.35
5. Step 5: Solve for x
   x = 372,020,507.35/22,209.59
6. Step 6: Final answer
   x = 16,750.44