Finding the Third Proportional to 449,638 and 978,574

Step by Step Solution

1. Step 1: Write the proportion equation
   449,638 : 978,574 = 978,574 : x
2. Step 2: Convert to fraction form
   449,638/978,574 = 978,574/x
3. Step 3: Cross multiply
   449,638x = 978,574 × 978,574
4. Step 4: Simplify right side
   449,638x = 957,607,073,476
5. Step 5: Solve for x
   x = 957,607,073,476/449,638
6. Step 6: Final answer
   x = 2,129,728.97