Finding the Third Proportional to 643,108 and 1,396,928

Step by Step Solution

1. Step 1: Write the proportion equation
   643,108 : 1,396,928 = 1,396,928 : x
2. Step 2: Convert to fraction form
   643,108/1,396,928 = 1,396,928/x
3. Step 3: Cross multiply
   643,108x = 1,396,928 × 1,396,928
4. Step 4: Simplify right side
   643,108x = 1,951,407,837,184
5. Step 5: Solve for x
   x = 1,951,407,837,184/643,108
6. Step 6: Final answer
   x = 3,034,339.24