Finding the Third Proportional to 401,568 and 621,792

Step by Step Solution

1. Step 1: Write the proportion equation
   401,568 : 621,792 = 621,792 : x
2. Step 2: Convert to fraction form
   401,568/621,792 = 621,792/x
3. Step 3: Cross multiply
   401,568x = 621,792 × 621,792
4. Step 4: Simplify right side
   401,568x = 386,625,291,264
5. Step 5: Solve for x
   x = 386,625,291,264/401,568
6. Step 6: Final answer
   x = 962,789.09