Finding the Third Proportional to 1,287,404 and 1,891,694

Step by Step Solution

1. Step 1: Write the proportion equation
   1,287,404 : 1,891,694 = 1,891,694 : x
2. Step 2: Convert to fraction form
   1,287,404/1,891,694 = 1,891,694/x
3. Step 3: Cross multiply
   1,287,404x = 1,891,694 × 1,891,694
4. Step 4: Simplify right side
   1,287,404x = 3,578,506,189,636
5. Step 5: Solve for x
   x = 3,578,506,189,636/1,287,404
6. Step 6: Final answer
   x = 2,779,629.54