Finding the Third Proportional to 11,428.31 and 15,168.38

Step by Step Solution

1. Step 1: Write the proportion equation
   11,428.31 : 15,168.38 = 15,168.38 : x
2. Step 2: Convert to fraction form
   11,428.31/15,168.38 = 15,168.38/x
3. Step 3: Cross multiply
   11,428.31x = 15,168.38 × 15,168.38
4. Step 4: Simplify right side
   11,428.31x = 230,079,600.14
5. Step 5: Solve for x
   x = 230,079,600.14/11,428.31
6. Step 6: Final answer
   x = 20,132.42