Finding the Third Proportional to 1,081,728 and 1,683,720

Step by Step Solution

1. Step 1: Write the proportion equation
   1,081,728 : 1,683,720 = 1,683,720 : x
2. Step 2: Convert to fraction form
   1,081,728/1,683,720 = 1,683,720/x
3. Step 3: Cross multiply
   1,081,728x = 1,683,720 × 1,683,720
4. Step 4: Simplify right side
   1,081,728x = 2,834,913,038,400
5. Step 5: Solve for x
   x = 2,834,913,038,400/1,081,728
6. Step 6: Final answer
   x = 2,620,726.32