Finding the Third Proportional to 19,842 and 40,398

Step by Step Solution

1. Step 1: Write the proportion equation
   19,842 : 40,398 = 40,398 : x
2. Step 2: Convert to fraction form
   19,842/40,398 = 40,398/x
3. Step 3: Cross multiply
   19,842x = 40,398 × 40,398
4. Step 4: Simplify right side
   19,842x = 1,631,998,404
5. Step 5: Solve for x
   x = 1,631,998,404/19,842
6. Step 6: Final answer
   x = 82,249.69