Finding the Third Proportional to 713,498 and 978,389

Step by Step Solution

1. Step 1: Write the proportion equation
   713,498 : 978,389 = 978,389 : x
2. Step 2: Convert to fraction form
   713,498/978,389 = 978,389/x
3. Step 3: Cross multiply
   713,498x = 978,389 × 978,389
4. Step 4: Simplify right side
   713,498x = 957,245,035,321
5. Step 5: Solve for x
   x = 957,245,035,321/713,498
6. Step 6: Final answer
   x = 1,341,622.59