Finding the Third Proportional to 442,707 and 978,443

Step by Step Solution

1. Step 1: Write the proportion equation
   442,707 : 978,443 = 978,443 : x
2. Step 2: Convert to fraction form
   442,707/978,443 = 978,443/x
3. Step 3: Cross multiply
   442,707x = 978,443 × 978,443
4. Step 4: Simplify right side
   442,707x = 957,350,704,249
5. Step 5: Solve for x
   x = 957,350,704,249/442,707
6. Step 6: Final answer
   x = 2,162,492.81