Finding the Third Proportional to 449,878 and 978,486

Step by Step Solution

1. Step 1: Write the proportion equation
   449,878 : 978,486 = 978,486 : x
2. Step 2: Convert to fraction form
   449,878/978,486 = 978,486/x
3. Step 3: Cross multiply
   449,878x = 978,486 × 978,486
4. Step 4: Simplify right side
   449,878x = 957,434,852,196
5. Step 5: Solve for x
   x = 957,434,852,196/449,878
6. Step 6: Final answer
   x = 2,128,209.99