Finding the Third Proportional to 11,189.81 and 15,144.47

Step by Step Solution

1. Step 1: Write the proportion equation
   11,189.81 : 15,144.47 = 15,144.47 : x
2. Step 2: Convert to fraction form
   11,189.81/15,144.47 = 15,144.47/x
3. Step 3: Cross multiply
   11,189.81x = 15,144.47 × 15,144.47
4. Step 4: Simplify right side
   11,189.81x = 229,354,933.72
5. Step 5: Solve for x
   x = 229,354,933.72/11,189.81
6. Step 6: Final answer
   x = 20,496.76