Finding the Third Proportional to 1,198,740 and 1,686,240

Step by Step Solution

1. Step 1: Write the proportion equation
   1,198,740 : 1,686,240 = 1,686,240 : x
2. Step 2: Convert to fraction form
   1,198,740/1,686,240 = 1,686,240/x
3. Step 3: Cross multiply
   1,198,740x = 1,686,240 × 1,686,240
4. Step 4: Simplify right side
   1,198,740x = 2,843,405,337,600
5. Step 5: Solve for x
   x = 2,843,405,337,600/1,198,740
6. Step 6: Final answer
   x = 2,371,995.04