Finding the Third Proportional to 978,618 and 1,378,116

Step by Step Solution

1. Step 1: Write the proportion equation
   978,618 : 1,378,116 = 1,378,116 : x
2. Step 2: Convert to fraction form
   978,618/1,378,116 = 1,378,116/x
3. Step 3: Cross multiply
   978,618x = 1,378,116 × 1,378,116
4. Step 4: Simplify right side
   978,618x = 1,899,203,709,456
5. Step 5: Solve for x
   x = 1,899,203,709,456/978,618
6. Step 6: Final answer
   x = 1,940,699.75