Finding the Third Proportional to 978,555 and 1,378,028

Step by Step Solution

1. Step 1: Write the proportion equation
   978,555 : 1,378,028 = 1,378,028 : x
2. Step 2: Convert to fraction form
   978,555/1,378,028 = 1,378,028/x
3. Step 3: Cross multiply
   978,555x = 1,378,028 × 1,378,028
4. Step 4: Simplify right side
   978,555x = 1,898,961,168,784
5. Step 5: Solve for x
   x = 1,898,961,168,784/978,555
6. Step 6: Final answer
   x = 1,940,576.84