Finding the Third Proportional to 1,216,856 and 1,891,657

Step by Step Solution

1. Step 1: Write the proportion equation
   1,216,856 : 1,891,657 = 1,891,657 : x
2. Step 2: Convert to fraction form
   1,216,856/1,891,657 = 1,891,657/x
3. Step 3: Cross multiply
   1,216,856x = 1,891,657 × 1,891,657
4. Step 4: Simplify right side
   1,216,856x = 3,578,366,205,649
5. Step 5: Solve for x
   x = 3,578,366,205,649/1,216,856
6. Step 6: Final answer
   x = 2,940,665.29