Finding the Third Proportional to 1,987,488 and 4,289,724

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987,488 : 4,289,724 = 4,289,724 : x
2. Step 2: Convert to fraction form
   1,987,488/4,289,724 = 4,289,724/x
3. Step 3: Cross multiply
   1,987,488x = 4,289,724 × 4,289,724
4. Step 4: Simplify right side
   1,987,488x = 18,401,731,996,176
5. Step 5: Solve for x
   x = 18,401,731,996,176/1,987,488
6. Step 6: Final answer
   x = 9,258,788.98