Finding the Third Proportional to 1,216,860 and 1,891,663

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216,860 : 1,891,663 = 1,891,663 : x
2. Step 2: Convert to fraction form
   1,216,860/1,891,663 = 1,891,663/x
3. Step 3: Cross multiply
   1,216,860x = 1,891,663 × 1,891,663
4. Step 4: Simplify right side
   1,216,860x = 3,578,388,905,569
5. Step 5: Solve for x
   x = 3,578,388,905,569/1,216,860
6. Step 6: Final answer
   x = 2,940,674.28