Finding the Third Proportional to 287,995.50 and 628,398

Step by Step Solution

1. Step 1: Write the proportion equation
   287,995.50 : 628,398 = 628,398 : x
2. Step 2: Convert to fraction form
   287,995.50/628,398 = 628,398/x
3. Step 3: Cross multiply
   287,995.50x = 628,398 × 628,398
4. Step 4: Simplify right side
   287,995.50x = 394,884,046,404
5. Step 5: Solve for x
   x = 394,884,046,404/287,995.50
6. Step 6: Final answer
   x = 1,371,146.59