Finding the Third Proportional to 713,672 and 978,609

Step by Step Solution

1. Step 1: Write the proportion equation
   713,672 : 978,609 = 978,609 : x
2. Step 2: Convert to fraction form
   713,672/978,609 = 978,609/x
3. Step 3: Cross multiply
   713,672x = 978,609 × 978,609
4. Step 4: Simplify right side
   713,672x = 957,675,574,881
5. Step 5: Solve for x
   x = 957,675,574,881/713,672
6. Step 6: Final answer
   x = 1,341,898.76