Finding the Third Proportional to 978,486 and 1,377,921

Step by Step Solution

1. Step 1: Write the proportion equation
   978,486 : 1,377,921 = 1,377,921 : x
2. Step 2: Convert to fraction form
   978,486/1,377,921 = 1,377,921/x
3. Step 3: Cross multiply
   978,486x = 1,377,921 × 1,377,921
4. Step 4: Simplify right side
   978,486x = 1,898,666,282,241
5. Step 5: Solve for x
   x = 1,898,666,282,241/978,486
6. Step 6: Final answer
   x = 1,940,412.31