Finding the Third Proportional to 287,544 and 620,016

Step by Step Solution

1. Step 1: Write the proportion equation
   287,544 : 620,016 = 620,016 : x
2. Step 2: Convert to fraction form
   287,544/620,016 = 620,016/x
3. Step 3: Cross multiply
   287,544x = 620,016 × 620,016
4. Step 4: Simplify right side
   287,544x = 384,419,840,256
5. Step 5: Solve for x
   x = 384,419,840,256/287,544
6. Step 6: Final answer
   x = 1,336,907.88