Finding the Third Proportional to 621,824 and 1,338,792

Step by Step Solution

1. Step 1: Write the proportion equation
   621,824 : 1,338,792 = 1,338,792 : x
2. Step 2: Convert to fraction form
   621,824/1,338,792 = 1,338,792/x
3. Step 3: Cross multiply
   621,824x = 1,338,792 × 1,338,792
4. Step 4: Simplify right side
   621,824x = 1,792,364,019,264
5. Step 5: Solve for x
   x = 1,792,364,019,264/621,824
6. Step 6: Final answer
   x = 2,882,429.79