Finding the Third Proportional to 1,287,990 and 2,797,218

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287,990 : 2,797,218 = 2,797,218 : x
2. Step 2: Convert to fraction form
   1,287,990/2,797,218 = 2,797,218/x
3. Step 3: Cross multiply
   1,287,990x = 2,797,218 × 2,797,218
4. Step 4: Simplify right side
   1,287,990x = 7,824,428,539,524
5. Step 5: Solve for x
   x = 7,824,428,539,524/1,287,990
6. Step 6: Final answer
   x = 6,074,914.04