Finding the Third Proportional to 13,660 and 20,854.50

Step by Step Solution

1. Step 1: Write the proportion equation
   13,660 : 20,854.50 = 20,854.50 : x
2. Step 2: Convert to fraction form
   13,660/20,854.50 = 20,854.50/x
3. Step 3: Cross multiply
   13,660x = 20,854.50 × 20,854.50
4. Step 4: Simplify right side
   13,660x = 434,910,170.25
5. Step 5: Solve for x
   x = 434,910,170.25/13,660
6. Step 6: Final answer
   x = 31,838.23