Finding the Third Proportional to 449,864 and 978,458

Step by Step Solution

1. Step 1: Write the proportion equation
   449,864 : 978,458 = 978,458 : x
2. Step 2: Convert to fraction form
   449,864/978,458 = 978,458/x
3. Step 3: Cross multiply
   449,864x = 978,458 × 978,458
4. Step 4: Simplify right side
   449,864x = 957,380,057,764
5. Step 5: Solve for x
   x = 957,380,057,764/449,864
6. Step 6: Final answer
   x = 2,128,154.42