Finding the Third Proportional to 639,887 and 1,400,302

Step by Step Solution

1. Step 1: Write the proportion equation
   639,887 : 1,400,302 = 1,400,302 : x
2. Step 2: Convert to fraction form
   639,887/1,400,302 = 1,400,302/x
3. Step 3: Cross multiply
   639,887x = 1,400,302 × 1,400,302
4. Step 4: Simplify right side
   639,887x = 1,960,845,691,204
5. Step 5: Solve for x
   x = 1,960,845,691,204/639,887
6. Step 6: Final answer
   x = 3,064,362.44