Finding the Third Proportional to 144,910 and 315,568

Step by Step Solution

1. Step 1: Write the proportion equation
   144,910 : 315,568 = 315,568 : x
2. Step 2: Convert to fraction form
   144,910/315,568 = 315,568/x
3. Step 3: Cross multiply
   144,910x = 315,568 × 315,568
4. Step 4: Simplify right side
   144,910x = 99,583,162,624
5. Step 5: Solve for x
   x = 99,583,162,624/144,910
6. Step 6: Final answer
   x = 687,206.97