Finding the Third Proportional to 307,183.50 and 638,883

Step by Step Solution

1. Step 1: Write the proportion equation
   307,183.50 : 638,883 = 638,883 : x
2. Step 2: Convert to fraction form
   307,183.50/638,883 = 638,883/x
3. Step 3: Cross multiply
   307,183.50x = 638,883 × 638,883
4. Step 4: Simplify right side
   307,183.50x = 408,171,487,689
5. Step 5: Solve for x
   x = 408,171,487,689/307,183.50
6. Step 6: Final answer
   x = 1,328,754.60