Finding the Fourth Proportional to 42,422.23, 63,647.18 and 20,232.72

Step by Step Solution

1. Step 1: Write the proportion equation
   42,422.23 : 63,647.18 = 20,232.72 : x
2. Step 2: Convert to fraction form
   42,422.23/63,647.18 = 20,232.72/x
3. Step 3: Cross multiply
   42,422.23x = 63,647.18 × 20,232.72
4. Step 4: Simplify right side
   42,422.23x = 1,287,755,470.57
5. Step 5: Solve for x
   x = 1,287,755,470.57/42,422.23
6. Step 6: Final answer
   x = 30,355.68