Finding the Third Proportional to 11,272.50 and 15,207.75

Step by Step Solution

1. Step 1: Write the proportion equation
   11,272.50 : 15,207.75 = 15,207.75 : x
2. Step 2: Convert to fraction form
   11,272.50/15,207.75 = 15,207.75/x
3. Step 3: Cross multiply
   11,272.50x = 15,207.75 × 15,207.75
4. Step 4: Simplify right side
   11,272.50x = 231,275,660.06
5. Step 5: Solve for x
   x = 231,275,660.06/11,272.50
6. Step 6: Final answer
   x = 20,516.80