Finding the Third Proportional to 13,135.50 and 20,185.88

Step by Step Solution

1. Step 1: Write the proportion equation
   13,135.50 : 20,185.88 = 20,185.88 : x
2. Step 2: Convert to fraction form
   13,135.50/20,185.88 = 20,185.88/x
3. Step 3: Cross multiply
   13,135.50x = 20,185.88 × 20,185.88
4. Step 4: Simplify right side
   13,135.50x = 407,469,549.52
5. Step 5: Solve for x
   x = 407,469,549.52/13,135.50
6. Step 6: Final answer
   x = 31,020.48