Finding the Third Proportional to 637,830 and 978,707

Step by Step Solution

1. Step 1: Write the proportion equation
   637,830 : 978,707 = 978,707 : x
2. Step 2: Convert to fraction form
   637,830/978,707 = 978,707/x
3. Step 3: Cross multiply
   637,830x = 978,707 × 978,707
4. Step 4: Simplify right side
   637,830x = 957,867,391,849
5. Step 5: Solve for x
   x = 957,867,391,849/637,830
6. Step 6: Final answer
   x = 1,501,759.70