Finding the Third Proportional to 1,311,198 and 1,978,845

Step by Step Solution

1. Step 1: Write the proportion equation
   1,311,198 : 1,978,845 = 1,978,845 : x
2. Step 2: Convert to fraction form
   1,311,198/1,978,845 = 1,978,845/x
3. Step 3: Cross multiply
   1,311,198x = 1,978,845 × 1,978,845
4. Step 4: Simplify right side
   1,311,198x = 3,915,827,534,025
5. Step 5: Solve for x
   x = 3,915,827,534,025/1,311,198
6. Step 6: Final answer
   x = 2,986,450.20