Finding the Third Proportional to 713,540 and 978,456

Step by Step Solution

1. Step 1: Write the proportion equation
   713,540 : 978,456 = 978,456 : x
2. Step 2: Convert to fraction form
   713,540/978,456 = 978,456/x
3. Step 3: Cross multiply
   713,540x = 978,456 × 978,456
4. Step 4: Simplify right side
   713,540x = 957,376,143,936
5. Step 5: Solve for x
   x = 957,376,143,936/713,540
6. Step 6: Final answer
   x = 1,341,727.36