Finding the Fourth Proportional to 15,321.97, 22,871.15 and 13,144.69

Step by Step Solution

1. Step 1: Write the proportion equation
   15,321.97 : 22,871.15 = 13,144.69 : x
2. Step 2: Convert to fraction form
   15,321.97/22,871.15 = 13,144.69/x
3. Step 3: Cross multiply
   15,321.97x = 22,871.15 × 13,144.69
4. Step 4: Simplify right side
   15,321.97x = 300,634,176.69
5. Step 5: Solve for x
   x = 300,634,176.69/15,321.97
6. Step 6: Final answer
   x = 19,621.12