Finding the Third Proportional to 639,792 and 1,368,144

Step by Step Solution

1. Step 1: Write the proportion equation
   639,792 : 1,368,144 = 1,368,144 : x
2. Step 2: Convert to fraction form
   639,792/1,368,144 = 1,368,144/x
3. Step 3: Cross multiply
   639,792x = 1,368,144 × 1,368,144
4. Step 4: Simplify right side
   639,792x = 1,871,818,004,736
5. Step 5: Solve for x
   x = 1,871,818,004,736/639,792
6. Step 6: Final answer
   x = 2,925,666.47