Finding the Third Proportional to 1,216,862 and 1,891,666

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216,862 : 1,891,666 = 1,891,666 : x
2. Step 2: Convert to fraction form
   1,216,862/1,891,666 = 1,891,666/x
3. Step 3: Cross multiply
   1,216,862x = 1,891,666 × 1,891,666
4. Step 4: Simplify right side
   1,216,862x = 3,578,400,255,556
5. Step 5: Solve for x
   x = 3,578,400,255,556/1,216,862
6. Step 6: Final answer
   x = 2,940,678.78