Finding the Third Proportional to 2,658,861 and 3,987,289

Step by Step Solution

1. Step 1: Write the proportion equation
   2,658,861 : 3,987,289 = 3,987,289 : x
2. Step 2: Convert to fraction form
   2,658,861/3,987,289 = 3,987,289/x
3. Step 3: Cross multiply
   2,658,861x = 3,987,289 × 3,987,289
4. Step 4: Simplify right side
   2,658,861x = 15,898,473,569,521
5. Step 5: Solve for x
   x = 15,898,473,569,521/2,658,861
6. Step 6: Final answer
   x = 5,979,430.13