Finding the Third Proportional to 20,391.75 and 31,512.38

Step by Step Solution

1. Step 1: Write the proportion equation
   20,391.75 : 31,512.38 = 31,512.38 : x
2. Step 2: Convert to fraction form
   20,391.75/31,512.38 = 31,512.38/x
3. Step 3: Cross multiply
   20,391.75x = 31,512.38 × 31,512.38
4. Step 4: Simplify right side
   20,391.75x = 993,029,778.14
5. Step 5: Solve for x
   x = 993,029,778.14/20,391.75
6. Step 6: Final answer
   x = 48,697.62