Finding the Third Proportional to 442,708 and 978,446

Step by Step Solution

1. Step 1: Write the proportion equation
   442,708 : 978,446 = 978,446 : x
2. Step 2: Convert to fraction form
   442,708/978,446 = 978,446/x
3. Step 3: Cross multiply
   442,708x = 978,446 × 978,446
4. Step 4: Simplify right side
   442,708x = 957,356,574,916
5. Step 5: Solve for x
   x = 957,356,574,916/442,708
6. Step 6: Final answer
   x = 2,162,501.19