Finding the Third Proportional to 639,984 and 1,382,595

Step by Step Solution

1. Step 1: Write the proportion equation
   639,984 : 1,382,595 = 1,382,595 : x
2. Step 2: Convert to fraction form
   639,984/1,382,595 = 1,382,595/x
3. Step 3: Cross multiply
   639,984x = 1,382,595 × 1,382,595
4. Step 4: Simplify right side
   639,984x = 1,911,568,934,025
5. Step 5: Solve for x
   x = 1,911,568,934,025/639,984
6. Step 6: Final answer
   x = 2,986,901.13