Finding the Third Proportional to 713,442 and 978,309

Step by Step Solution

1. Step 1: Write the proportion equation
   713,442 : 978,309 = 978,309 : x
2. Step 2: Convert to fraction form
   713,442/978,309 = 978,309/x
3. Step 3: Cross multiply
   713,442x = 978,309 × 978,309
4. Step 4: Simplify right side
   713,442x = 957,088,499,481
5. Step 5: Solve for x
   x = 957,088,499,481/713,442
6. Step 6: Final answer
   x = 1,341,508.49