Finding the Third Proportional to 643,935 and 1,398,585

Step by Step Solution

1. Step 1: Write the proportion equation
   643,935 : 1,398,585 = 1,398,585 : x
2. Step 2: Convert to fraction form
   643,935/1,398,585 = 1,398,585/x
3. Step 3: Cross multiply
   643,935x = 1,398,585 × 1,398,585
4. Step 4: Simplify right side
   643,935x = 1,956,040,002,225
5. Step 5: Solve for x
   x = 1,956,040,002,225/643,935
6. Step 6: Final answer
   x = 3,037,635.79