Finding the Fourth Proportional to 22,478.28, 31,021.72 and 13,048.26

Step by Step Solution

1. Step 1: Write the proportion equation
   22,478.28 : 31,021.72 = 13,048.26 : x
2. Step 2: Convert to fraction form
   22,478.28/31,021.72 = 13,048.26/x
3. Step 3: Cross multiply
   22,478.28x = 31,021.72 × 13,048.26
4. Step 4: Simplify right side
   22,478.28x = 404,779,468.21
5. Step 5: Solve for x
   x = 404,779,468.21/22,478.28
6. Step 6: Final answer
   x = 18,007.58