Finding the Third Proportional to 9,966 and 19,932

Step by Step Solution

1. Step 1: Write the proportion equation
   9,966 : 19,932 = 19,932 : x
2. Step 2: Convert to fraction form
   9,966/19,932 = 19,932/x
3. Step 3: Cross multiply
   9,966x = 19,932 × 19,932
4. Step 4: Simplify right side
   9,966x = 397,284,624
5. Step 5: Solve for x
   x = 397,284,624/9,966
6. Step 6: Final answer
   x = 39,864