Finding the Third Proportional to 13,318.50 and 20,709.75

Step by Step Solution

1. Step 1: Write the proportion equation
   13,318.50 : 20,709.75 = 20,709.75 : x
2. Step 2: Convert to fraction form
   13,318.50/20,709.75 = 20,709.75/x
3. Step 3: Cross multiply
   13,318.50x = 20,709.75 × 20,709.75
4. Step 4: Simplify right side
   13,318.50x = 428,893,745.06
5. Step 5: Solve for x
   x = 428,893,745.06/13,318.50
6. Step 6: Final answer
   x = 32,202.86