Finding the Third Proportional to 20,244 and 42,689

Step by Step Solution

1. Step 1: Write the proportion equation
   20,244 : 42,689 = 42,689 : x
2. Step 2: Convert to fraction form
   20,244/42,689 = 42,689/x
3. Step 3: Cross multiply
   20,244x = 42,689 × 42,689
4. Step 4: Simplify right side
   20,244x = 1,822,350,721
5. Step 5: Solve for x
   x = 1,822,350,721/20,244
6. Step 6: Final answer
   x = 90,019.30