Finding the Third Proportional to 687,771 and 1,515,510

Step by Step Solution

1. Step 1: Write the proportion equation
   687,771 : 1,515,510 = 1,515,510 : x
2. Step 2: Convert to fraction form
   687,771/1,515,510 = 1,515,510/x
3. Step 3: Cross multiply
   687,771x = 1,515,510 × 1,515,510
4. Step 4: Simplify right side
   687,771x = 2,296,770,560,100
5. Step 5: Solve for x
   x = 2,296,770,560,100/687,771
6. Step 6: Final answer
   x = 3,339,440.83