Finding the Third Proportional to 632,486 and 978,290

Step by Step Solution

1. Step 1: Write the proportion equation
   632,486 : 978,290 = 978,290 : x
2. Step 2: Convert to fraction form
   632,486/978,290 = 978,290/x
3. Step 3: Cross multiply
   632,486x = 978,290 × 978,290
4. Step 4: Simplify right side
   632,486x = 957,051,324,100
5. Step 5: Solve for x
   x = 957,051,324,100/632,486
6. Step 6: Final answer
   x = 1,513,158.12