Finding the Third Proportional to 449,923 and 978,578

Step by Step Solution

1. Step 1: Write the proportion equation
   449,923 : 978,578 = 978,578 : x
2. Step 2: Convert to fraction form
   449,923/978,578 = 978,578/x
3. Step 3: Cross multiply
   449,923x = 978,578 × 978,578
4. Step 4: Simplify right side
   449,923x = 957,614,902,084
5. Step 5: Solve for x
   x = 957,614,902,084/449,923
6. Step 6: Final answer
   x = 2,128,397.31