Finding the Third Proportional to 639,966 and 1,371,012

Step by Step Solution

1. Step 1: Write the proportion equation
   639,966 : 1,371,012 = 1,371,012 : x
2. Step 2: Convert to fraction form
   639,966/1,371,012 = 1,371,012/x
3. Step 3: Cross multiply
   639,966x = 1,371,012 × 1,371,012
4. Step 4: Simplify right side
   639,966x = 1,879,673,904,144
5. Step 5: Solve for x
   x = 1,879,673,904,144/639,966
6. Step 6: Final answer
   x = 2,937,146.51