Finding the Third Proportional to 19,987 and 40,662

Step by Step Solution

1. Step 1: Write the proportion equation
   19,987 : 40,662 = 40,662 : x
2. Step 2: Convert to fraction form
   19,987/40,662 = 40,662/x
3. Step 3: Cross multiply
   19,987x = 40,662 × 40,662
4. Step 4: Simplify right side
   19,987x = 1,653,398,244
5. Step 5: Solve for x
   x = 1,653,398,244/19,987
6. Step 6: Final answer
   x = 82,723.68