Finding the Third Proportional to 639,801 and 1,400,130

Step by Step Solution

1. Step 1: Write the proportion equation
   639,801 : 1,400,130 = 1,400,130 : x
2. Step 2: Convert to fraction form
   639,801/1,400,130 = 1,400,130/x
3. Step 3: Cross multiply
   639,801x = 1,400,130 × 1,400,130
4. Step 4: Simplify right side
   639,801x = 1,960,364,016,900
5. Step 5: Solve for x
   x = 1,960,364,016,900/639,801
6. Step 6: Final answer
   x = 3,064,021.50