Finding the Third Proportional to 639,929 and 1,382,484

Step by Step Solution

1. Step 1: Write the proportion equation
   639,929 : 1,382,484 = 1,382,484 : x
2. Step 2: Convert to fraction form
   639,929/1,382,484 = 1,382,484/x
3. Step 3: Cross multiply
   639,929x = 1,382,484 × 1,382,484
4. Step 4: Simplify right side
   639,929x = 1,911,262,010,256
5. Step 5: Solve for x
   x = 1,911,262,010,256/639,929
6. Step 6: Final answer
   x = 2,986,678.23