Finding the Third Proportional to 1,987,470 and 4,289,685

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987,470 : 4,289,685 = 4,289,685 : x
2. Step 2: Convert to fraction form
   1,987,470/4,289,685 = 4,289,685/x
3. Step 3: Cross multiply
   1,987,470x = 4,289,685 × 4,289,685
4. Step 4: Simplify right side
   1,987,470x = 18,401,397,399,225
5. Step 5: Solve for x
   x = 18,401,397,399,225/1,987,470
6. Step 6: Final answer
   x = 9,258,704.48