Finding the Third Proportional to 643,096 and 1,396,872

Step by Step Solution

1. Step 1: Write the proportion equation
   643,096 : 1,396,872 = 1,396,872 : x
2. Step 2: Convert to fraction form
   643,096/1,396,872 = 1,396,872/x
3. Step 3: Cross multiply
   643,096x = 1,396,872 × 1,396,872
4. Step 4: Simplify right side
   643,096x = 1,951,251,384,384
5. Step 5: Solve for x
   x = 1,951,251,384,384/643,096
6. Step 6: Final answer
   x = 3,034,152.58