Finding the Third Proportional to 20,211.33 and 42,517.29

Step by Step Solution

1. Step 1: Write the proportion equation
   20,211.33 : 42,517.29 = 42,517.29 : x
2. Step 2: Convert to fraction form
   20,211.33/42,517.29 = 42,517.29/x
3. Step 3: Cross multiply
   20,211.33x = 42,517.29 × 42,517.29
4. Step 4: Simplify right side
   20,211.33x = 1,807,719,744.66
5. Step 5: Solve for x
   x = 1,807,719,744.66/20,211.33
6. Step 6: Final answer
   x = 89,440.91