Finding the Third Proportional to 20,429 and 42,919

Step by Step Solution

1. Step 1: Write the proportion equation
   20,429 : 42,919 = 42,919 : x
2. Step 2: Convert to fraction form
   20,429/42,919 = 42,919/x
3. Step 3: Cross multiply
   20,429x = 42,919 × 42,919
4. Step 4: Simplify right side
   20,429x = 1,842,040,561
5. Step 5: Solve for x
   x = 1,842,040,561/20,429
6. Step 6: Final answer
   x = 90,167.93