Finding the Third Proportional to 639,914 and 1,400,356

Step by Step Solution

1. Step 1: Write the proportion equation
   639,914 : 1,400,356 = 1,400,356 : x
2. Step 2: Convert to fraction form
   639,914/1,400,356 = 1,400,356/x
3. Step 3: Cross multiply
   639,914x = 1,400,356 × 1,400,356
4. Step 4: Simplify right side
   639,914x = 1,960,996,926,736
5. Step 5: Solve for x
   x = 1,960,996,926,736/639,914
6. Step 6: Final answer
   x = 3,064,469.49