Finding the Third Proportional to 643,584 and 1,413,792

Step by Step Solution

1. Step 1: Write the proportion equation
   643,584 : 1,413,792 = 1,413,792 : x
2. Step 2: Convert to fraction form
   643,584/1,413,792 = 1,413,792/x
3. Step 3: Cross multiply
   643,584x = 1,413,792 × 1,413,792
4. Step 4: Simplify right side
   643,584x = 1,998,807,819,264
5. Step 5: Solve for x
   x = 1,998,807,819,264/643,584
6. Step 6: Final answer
   x = 3,105,745.05