Finding the Fourth Proportional to 22,202.52, 30,640.06 and 13,255.20

Step by Step Solution

1. Step 1: Write the proportion equation
   22,202.52 : 30,640.06 = 13,255.20 : x
2. Step 2: Convert to fraction form
   22,202.52/30,640.06 = 13,255.20/x
3. Step 3: Cross multiply
   22,202.52x = 30,640.06 × 13,255.20
4. Step 4: Simplify right side
   22,202.52x = 406,140,123.31
5. Step 5: Solve for x
   x = 406,140,123.31/22,202.52
6. Step 6: Final answer
   x = 18,292.52