Finding the Third Proportional to 978,622 and 1,378,122

Step by Step Solution

1. Step 1: Write the proportion equation
   978,622 : 1,378,122 = 1,378,122 : x
2. Step 2: Convert to fraction form
   978,622/1,378,122 = 1,378,122/x
3. Step 3: Cross multiply
   978,622x = 1,378,122 × 1,378,122
4. Step 4: Simplify right side
   978,622x = 1,899,220,246,884
5. Step 5: Solve for x
   x = 1,899,220,246,884/978,622
6. Step 6: Final answer
   x = 1,940,708.72