Finding the Third Proportional to 639,882 and 1,400,292

Step by Step Solution

1. Step 1: Write the proportion equation
   639,882 : 1,400,292 = 1,400,292 : x
2. Step 2: Convert to fraction form
   639,882/1,400,292 = 1,400,292/x
3. Step 3: Cross multiply
   639,882x = 1,400,292 × 1,400,292
4. Step 4: Simplify right side
   639,882x = 1,960,817,685,264
5. Step 5: Solve for x
   x = 1,960,817,685,264/639,882
6. Step 6: Final answer
   x = 3,064,342.62