Finding the Third Proportional to 1,987,509 and 4,289,730

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987,509 : 4,289,730 = 4,289,730 : x
2. Step 2: Convert to fraction form
   1,987,509/4,289,730 = 4,289,730/x
3. Step 3: Cross multiply
   1,987,509x = 4,289,730 × 4,289,730
4. Step 4: Simplify right side
   1,987,509x = 18,401,783,472,900
5. Step 5: Solve for x
   x = 18,401,783,472,900/1,987,509
6. Step 6: Final answer
   x = 9,258,717.05