Finding the Third Proportional to 639,897 and 1,400,320.50

Step by Step Solution

1. Step 1: Write the proportion equation
   639,897 : 1,400,320.50 = 1,400,320.50 : x
2. Step 2: Convert to fraction form
   639,897/1,400,320.50 = 1,400,320.50/x
3. Step 3: Cross multiply
   639,897x = 1,400,320.50 × 1,400,320.50
4. Step 4: Simplify right side
   639,897x = 1,960,897,502,720.25
5. Step 5: Solve for x
   x = 1,960,897,502,720.25/639,897
6. Step 6: Final answer
   x = 3,064,395.52