Finding the Third Proportional to 20,876 and 42,712

Step by Step Solution

1. Step 1: Write the proportion equation
   20,876 : 42,712 = 42,712 : x
2. Step 2: Convert to fraction form
   20,876/42,712 = 42,712/x
3. Step 3: Cross multiply
   20,876x = 42,712 × 42,712
4. Step 4: Simplify right side
   20,876x = 1,824,314,944
5. Step 5: Solve for x
   x = 1,824,314,944/20,876
6. Step 6: Final answer
   x = 87,388.15