Finding the Fourth Proportional to 31,072.71, 42,879.01 and 17,644.71

Step by Step Solution

1. Step 1: Write the proportion equation
   31,072.71 : 42,879.01 = 17,644.71 : x
2. Step 2: Convert to fraction form
   31,072.71/42,879.01 = 17,644.71/x
3. Step 3: Cross multiply
   31,072.71x = 42,879.01 × 17,644.71
4. Step 4: Simplify right side
   31,072.71x = 756,587,696.54
5. Step 5: Solve for x
   x = 756,587,696.54/31,072.71
6. Step 6: Final answer
   x = 24,348.94