Finding the Third Proportional to 449,656 and 978,628

Step by Step Solution

1. Step 1: Write the proportion equation
   449,656 : 978,628 = 978,628 : x
2. Step 2: Convert to fraction form
   449,656/978,628 = 978,628/x
3. Step 3: Cross multiply
   449,656x = 978,628 × 978,628
4. Step 4: Simplify right side
   449,656x = 957,712,762,384
5. Step 5: Solve for x
   x = 957,712,762,384/449,656
6. Step 6: Final answer
   x = 2,129,878.76