Finding the Third Proportional to 638,736 and 1,383,792

Step by Step Solution

1. Step 1: Write the proportion equation
   638,736 : 1,383,792 = 1,383,792 : x
2. Step 2: Convert to fraction form
   638,736/1,383,792 = 1,383,792/x
3. Step 3: Cross multiply
   638,736x = 1,383,792 × 1,383,792
4. Step 4: Simplify right side
   638,736x = 1,914,880,299,264
5. Step 5: Solve for x
   x = 1,914,880,299,264/638,736
6. Step 6: Final answer
   x = 2,997,921.36