Finding the Third Proportional to 449,973 and 978,678

Step by Step Solution

1. Step 1: Write the proportion equation
   449,973 : 978,678 = 978,678 : x
2. Step 2: Convert to fraction form
   449,973/978,678 = 978,678/x
3. Step 3: Cross multiply
   449,973x = 978,678 × 978,678
4. Step 4: Simplify right side
   449,973x = 957,810,627,684
5. Step 5: Solve for x
   x = 957,810,627,684/449,973
6. Step 6: Final answer
   x = 2,128,595.78