Finding the Third Proportional to 287,618 and 627,150

Step by Step Solution

1. Step 1: Write the proportion equation
   287,618 : 627,150 = 627,150 : x
2. Step 2: Convert to fraction form
   287,618/627,150 = 627,150/x
3. Step 3: Cross multiply
   287,618x = 627,150 × 627,150
4. Step 4: Simplify right side
   287,618x = 393,317,122,500
5. Step 5: Solve for x
   x = 393,317,122,500/287,618
6. Step 6: Final answer
   x = 1,367,498.29