Finding the Third Proportional to 1,686,382 and 3,980,802

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686,382 : 3,980,802 = 3,980,802 : x
2. Step 2: Convert to fraction form
   1,686,382/3,980,802 = 3,980,802/x
3. Step 3: Cross multiply
   1,686,382x = 3,980,802 × 3,980,802
4. Step 4: Simplify right side
   1,686,382x = 15,846,784,563,204
5. Step 5: Solve for x
   x = 15,846,784,563,204/1,686,382
6. Step 6: Final answer
   x = 9,396,912.78