Finding the Third Proportional to 643,450 and 1,372,398

Step by Step Solution

1. Step 1: Write the proportion equation
   643,450 : 1,372,398 = 1,372,398 : x
2. Step 2: Convert to fraction form
   643,450/1,372,398 = 1,372,398/x
3. Step 3: Cross multiply
   643,450x = 1,372,398 × 1,372,398
4. Step 4: Simplify right side
   643,450x = 1,883,476,270,404
5. Step 5: Solve for x
   x = 1,883,476,270,404/643,450
6. Step 6: Final answer
   x = 2,927,152.49