Finding the Third Proportional to 713,636 and 978,555

Step by Step Solution

1. Step 1: Write the proportion equation
   713,636 : 978,555 = 978,555 : x
2. Step 2: Convert to fraction form
   713,636/978,555 = 978,555/x
3. Step 3: Cross multiply
   713,636x = 978,555 × 978,555
4. Step 4: Simplify right side
   713,636x = 957,569,888,025
5. Step 5: Solve for x
   x = 957,569,888,025/713,636
6. Step 6: Final answer
   x = 1,341,818.36