Finding the Third Proportional to 622,919 and 978,648

Step by Step Solution

1. Step 1: Write the proportion equation
   622,919 : 978,648 = 978,648 : x
2. Step 2: Convert to fraction form
   622,919/978,648 = 978,648/x
3. Step 3: Cross multiply
   622,919x = 978,648 × 978,648
4. Step 4: Simplify right side
   622,919x = 957,751,907,904
5. Step 5: Solve for x
   x = 957,751,907,904/622,919
6. Step 6: Final answer
   x = 1,537,522.39