Finding the Fourth Proportional to 21,995.28, 30,349.27 and 13,050.72

Step by Step Solution

1. Step 1: Write the proportion equation
   21,995.28 : 30,349.27 = 13,050.72 : x
2. Step 2: Convert to fraction form
   21,995.28/30,349.27 = 13,050.72/x
3. Step 3: Cross multiply
   21,995.28x = 30,349.27 × 13,050.72
4. Step 4: Simplify right side
   21,995.28x = 396,079,824.97
5. Step 5: Solve for x
   x = 396,079,824.97/21,995.28
6. Step 6: Final answer
   x = 18,007.49