Finding the Third Proportional to 639,944 and 1,382,520

Step by Step Solution

1. Step 1: Write the proportion equation
   639,944 : 1,382,520 = 1,382,520 : x
2. Step 2: Convert to fraction form
   639,944/1,382,520 = 1,382,520/x
3. Step 3: Cross multiply
   639,944x = 1,382,520 × 1,382,520
4. Step 4: Simplify right side
   639,944x = 1,911,361,550,400
5. Step 5: Solve for x
   x = 1,911,361,550,400/639,944
6. Step 6: Final answer
   x = 2,986,763.76