Finding the Third Proportional to 20,779 and 42,782

Step by Step Solution

1. Step 1: Write the proportion equation
   20,779 : 42,782 = 42,782 : x
2. Step 2: Convert to fraction form
   20,779/42,782 = 42,782/x
3. Step 3: Cross multiply
   20,779x = 42,782 × 42,782
4. Step 4: Simplify right side
   20,779x = 1,830,299,524
5. Step 5: Solve for x
   x = 1,830,299,524/20,779
6. Step 6: Final answer
   x = 88,084.10