Finding the Third Proportional to 713,396 and 978,238

Step by Step Solution

1. Step 1: Write the proportion equation
   713,396 : 978,238 = 978,238 : x
2. Step 2: Convert to fraction form
   713,396/978,238 = 978,238/x
3. Step 3: Cross multiply
   713,396x = 978,238 × 978,238
4. Step 4: Simplify right side
   713,396x = 956,949,584,644
5. Step 5: Solve for x
   x = 956,949,584,644/713,396
6. Step 6: Final answer
   x = 1,341,400.27