Finding the Third Proportional to 620,378 and 1,339,792

Step by Step Solution

1. Step 1: Write the proportion equation
   620,378 : 1,339,792 = 1,339,792 : x
2. Step 2: Convert to fraction form
   620,378/1,339,792 = 1,339,792/x
3. Step 3: Cross multiply
   620,378x = 1,339,792 × 1,339,792
4. Step 4: Simplify right side
   620,378x = 1,795,042,603,264
5. Step 5: Solve for x
   x = 1,795,042,603,264/620,378
6. Step 6: Final answer
   x = 2,893,465.92