Finding the Third Proportional to 997,720 and 2,188,604

Step by Step Solution

1. Step 1: Write the proportion equation
   997,720 : 2,188,604 = 2,188,604 : x
2. Step 2: Convert to fraction form
   997,720/2,188,604 = 2,188,604/x
3. Step 3: Cross multiply
   997,720x = 2,188,604 × 2,188,604
4. Step 4: Simplify right side
   997,720x = 4,789,987,468,816
5. Step 5: Solve for x
   x = 4,789,987,468,816/997,720
6. Step 6: Final answer
   x = 4,800,933.60