Finding the Fourth Proportional to 22,300.20, 30,769.92 and 13,223.88

Step by Step Solution

1. Step 1: Write the proportion equation
   22,300.20 : 30,769.92 = 13,223.88 : x
2. Step 2: Convert to fraction form
   22,300.20/30,769.92 = 13,223.88/x
3. Step 3: Cross multiply
   22,300.20x = 30,769.92 × 13,223.88
4. Step 4: Simplify right side
   22,300.20x = 406,897,729.69
5. Step 5: Solve for x
   x = 406,897,729.69/22,300.20
6. Step 6: Final answer
   x = 18,246.37