Finding the Third Proportional to 622,916 and 978,644

Step by Step Solution

1. Step 1: Write the proportion equation
   622,916 : 978,644 = 978,644 : x
2. Step 2: Convert to fraction form
   622,916/978,644 = 978,644/x
3. Step 3: Cross multiply
   622,916x = 978,644 × 978,644
4. Step 4: Simplify right side
   622,916x = 957,744,078,736
5. Step 5: Solve for x
   x = 957,744,078,736/622,916
6. Step 6: Final answer
   x = 1,537,517.22