Finding the Third Proportional to 720,666 and 1,668,150

Step by Step Solution

1. Step 1: Write the proportion equation
   720,666 : 1,668,150 = 1,668,150 : x
2. Step 2: Convert to fraction form
   720,666/1,668,150 = 1,668,150/x
3. Step 3: Cross multiply
   720,666x = 1,668,150 × 1,668,150
4. Step 4: Simplify right side
   720,666x = 2,782,724,422,500
5. Step 5: Solve for x
   x = 2,782,724,422,500/720,666
6. Step 6: Final answer
   x = 3,861,323.31