Finding the Third Proportional to 11,926.50 and 15,687.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,926.50 : 15,687.75 = 15,687.75 : x
2. Step 2: Convert to fraction form
   11,926.50/15,687.75 = 15,687.75/x
3. Step 3: Cross multiply
   11,926.50x = 15,687.75 × 15,687.75
4. Step 4: Simplify right side
   11,926.50x = 246,105,500.06
5. Step 5: Solve for x
   x = 246,105,500.06/11,926.50
6. Step 6: Final answer
   x = 20,635.18