Finding the Third Proportional to 639,948 and 1,382,528

Step by Step Solution

1. Step 1: Write the proportion equation
   639,948 : 1,382,528 = 1,382,528 : x
2. Step 2: Convert to fraction form
   639,948/1,382,528 = 1,382,528/x
3. Step 3: Cross multiply
   639,948x = 1,382,528 × 1,382,528
4. Step 4: Simplify right side
   639,948x = 1,911,383,670,784
5. Step 5: Solve for x
   x = 1,911,383,670,784/639,948
6. Step 6: Final answer
   x = 2,986,779.66