Finding the Fourth Proportional to 23,144.16, 31,939.04 and 13,072.72

Step by Step Solution

1. Step 1: Write the proportion equation
   23,144.16 : 31,939.04 = 13,072.72 : x
2. Step 2: Convert to fraction form
   23,144.16/31,939.04 = 13,072.72/x
3. Step 3: Cross multiply
   23,144.16x = 31,939.04 × 13,072.72
4. Step 4: Simplify right side
   23,144.16x = 417,530,126.99
5. Step 5: Solve for x
   x = 417,530,126.99/23,144.16
6. Step 6: Final answer
   x = 18,040.41