Finding the Third Proportional to 449,660 and 978,636

Step by Step Solution

1. Step 1: Write the proportion equation
   449,660 : 978,636 = 978,636 : x
2. Step 2: Convert to fraction form
   449,660/978,636 = 978,636/x
3. Step 3: Cross multiply
   449,660x = 978,636 × 978,636
4. Step 4: Simplify right side
   449,660x = 957,728,420,496
5. Step 5: Solve for x
   x = 957,728,420,496/449,660
6. Step 6: Final answer
   x = 2,129,894.63