Finding the Third Proportional to 20,241.50 and 31,686.75

Step by Step Solution

1. Step 1: Write the proportion equation
   20,241.50 : 31,686.75 = 31,686.75 : x
2. Step 2: Convert to fraction form
   20,241.50/31,686.75 = 31,686.75/x
3. Step 3: Cross multiply
   20,241.50x = 31,686.75 × 31,686.75
4. Step 4: Simplify right side
   20,241.50x = 1,004,050,125.56
5. Step 5: Solve for x
   x = 1,004,050,125.56/20,241.50
6. Step 6: Final answer
   x = 49,603.54