Finding the Third Proportional to 1,086,212 and 1,519,311

Step by Step Solution

1. Step 1: Write the proportion equation
   1,086,212 : 1,519,311 = 1,519,311 : x
2. Step 2: Convert to fraction form
   1,086,212/1,519,311 = 1,519,311/x
3. Step 3: Cross multiply
   1,086,212x = 1,519,311 × 1,519,311
4. Step 4: Simplify right side
   1,086,212x = 2,308,305,914,721
5. Step 5: Solve for x
   x = 2,308,305,914,721/1,086,212
6. Step 6: Final answer
   x = 2,125,097.05