Finding the Third Proportional to 287,968 and 628,342.50

Step by Step Solution

1. Step 1: Write the proportion equation
   287,968 : 628,342.50 = 628,342.50 : x
2. Step 2: Convert to fraction form
   287,968/628,342.50 = 628,342.50/x
3. Step 3: Cross multiply
   287,968x = 628,342.50 × 628,342.50
4. Step 4: Simplify right side
   287,968x = 394,814,297,306.25
5. Step 5: Solve for x
   x = 394,814,297,306.25/287,968
6. Step 6: Final answer
   x = 1,371,035.31