Finding the Third Proportional to 639,774 and 1,358,268

Step by Step Solution

1. Step 1: Write the proportion equation
   639,774 : 1,358,268 = 1,358,268 : x
2. Step 2: Convert to fraction form
   639,774/1,358,268 = 1,358,268/x
3. Step 3: Cross multiply
   639,774x = 1,358,268 × 1,358,268
4. Step 4: Simplify right side
   639,774x = 1,844,891,959,824
5. Step 5: Solve for x
   x = 1,844,891,959,824/639,774
6. Step 6: Final answer
   x = 2,883,661.98