Finding the Third Proportional to 449,874 and 978,478

Step by Step Solution

1. Step 1: Write the proportion equation
   449,874 : 978,478 = 978,478 : x
2. Step 2: Convert to fraction form
   449,874/978,478 = 978,478/x
3. Step 3: Cross multiply
   449,874x = 978,478 × 978,478
4. Step 4: Simplify right side
   449,874x = 957,419,196,484
5. Step 5: Solve for x
   x = 957,419,196,484/449,874
6. Step 6: Final answer
   x = 2,128,194.11