Finding the Third Proportional to 442,697 and 978,430

Step by Step Solution

1. Step 1: Write the proportion equation
   442,697 : 978,430 = 978,430 : x
2. Step 2: Convert to fraction form
   442,697/978,430 = 978,430/x
3. Step 3: Cross multiply
   442,697x = 978,430 × 978,430
4. Step 4: Simplify right side
   442,697x = 957,325,264,900
5. Step 5: Solve for x
   x = 957,325,264,900/442,697
6. Step 6: Final answer
   x = 2,162,484.19