Finding the Third Proportional to 1,821,997 and 3,987,219

Step by Step Solution

1. Step 1: Write the proportion equation
   1,821,997 : 3,987,219 = 3,987,219 : x
2. Step 2: Convert to fraction form
   1,821,997/3,987,219 = 3,987,219/x
3. Step 3: Cross multiply
   1,821,997x = 3,987,219 × 3,987,219
4. Step 4: Simplify right side
   1,821,997x = 15,897,915,353,961
5. Step 5: Solve for x
   x = 15,897,915,353,961/1,821,997
6. Step 6: Final answer
   x = 8,725,544.20