Finding the Third Proportional to 20,255 and 42,711

Step by Step Solution

1. Step 1: Write the proportion equation
   20,255 : 42,711 = 42,711 : x
2. Step 2: Convert to fraction form
   20,255/42,711 = 42,711/x
3. Step 3: Cross multiply
   20,255x = 42,711 × 42,711
4. Step 4: Simplify right side
   20,255x = 1,824,229,521
5. Step 5: Solve for x
   x = 1,824,229,521/20,255
6. Step 6: Final answer
   x = 90,063.17