Finding the Fourth Proportional to 31,072.03, 42,879.69 and 17,643.57

Step by Step Solution

1. Step 1: Write the proportion equation
   31,072.03 : 42,879.69 = 17,643.57 : x
2. Step 2: Convert to fraction form
   31,072.03/42,879.69 = 17,643.57/x
3. Step 3: Cross multiply
   31,072.03x = 42,879.69 × 17,643.57
4. Step 4: Simplify right side
   31,072.03x = 756,550,701.78
5. Step 5: Solve for x
   x = 756,550,701.78/31,072.03
6. Step 6: Final answer
   x = 24,348.29