Finding the Third Proportional to 713,658 and 978,588

Step by Step Solution

1. Step 1: Write the proportion equation
   713,658 : 978,588 = 978,588 : x
2. Step 2: Convert to fraction form
   713,658/978,588 = 978,588/x
3. Step 3: Cross multiply
   713,658x = 978,588 × 978,588
4. Step 4: Simplify right side
   713,658x = 957,634,473,744
5. Step 5: Solve for x
   x = 957,634,473,744/713,658
6. Step 6: Final answer
   x = 1,341,867.50