Finding the Third Proportional to 1,818,921 and 3,960,766

Step by Step Solution

1. Step 1: Write the proportion equation
   1,818,921 : 3,960,766 = 3,960,766 : x
2. Step 2: Convert to fraction form
   1,818,921/3,960,766 = 3,960,766/x
3. Step 3: Cross multiply
   1,818,921x = 3,960,766 × 3,960,766
4. Step 4: Simplify right side
   1,818,921x = 15,687,667,306,756
5. Step 5: Solve for x
   x = 15,687,667,306,756/1,818,921
6. Step 6: Final answer
   x = 8,624,710.64