Finding the Third Proportional to 1,686,380 and 3,980,798

Step by Step Solution

1. Step 1: Write the proportion equation
   1,686,380 : 3,980,798 = 3,980,798 : x
2. Step 2: Convert to fraction form
   1,686,380/3,980,798 = 3,980,798/x
3. Step 3: Cross multiply
   1,686,380x = 3,980,798 × 3,980,798
4. Step 4: Simplify right side
   1,686,380x = 15,846,752,716,804
5. Step 5: Solve for x
   x = 15,846,752,716,804/1,686,380
6. Step 6: Final answer
   x = 9,396,905.04