Finding the Third Proportional to 978,597 and 1,378,089

Step by Step Solution

1. Step 1: Write the proportion equation
   978,597 : 1,378,089 = 1,378,089 : x
2. Step 2: Convert to fraction form
   978,597/1,378,089 = 1,378,089/x
3. Step 3: Cross multiply
   978,597x = 1,378,089 × 1,378,089
4. Step 4: Simplify right side
   978,597x = 1,899,129,291,921
5. Step 5: Solve for x
   x = 1,899,129,291,921/978,597
6. Step 6: Final answer
   x = 1,940,665.35