Finding the Third Proportional to 449,870 and 978,470

Step by Step Solution

1. Step 1: Write the proportion equation
   449,870 : 978,470 = 978,470 : x
2. Step 2: Convert to fraction form
   449,870/978,470 = 978,470/x
3. Step 3: Cross multiply
   449,870x = 978,470 × 978,470
4. Step 4: Simplify right side
   449,870x = 957,403,540,900
5. Step 5: Solve for x
   x = 957,403,540,900/449,870
6. Step 6: Final answer
   x = 2,128,178.23