Finding the Third Proportional to 462,132 and 990,648

Step by Step Solution

1. Step 1: Write the proportion equation
   462,132 : 990,648 = 990,648 : x
2. Step 2: Convert to fraction form
   462,132/990,648 = 990,648/x
3. Step 3: Cross multiply
   462,132x = 990,648 × 990,648
4. Step 4: Simplify right side
   462,132x = 981,383,459,904
5. Step 5: Solve for x
   x = 981,383,459,904/462,132
6. Step 6: Final answer
   x = 2,123,599.88