Finding the Fourth Proportional to 72,016.97, 99,383.49 and 40,185.18

Step by Step Solution

1. Step 1: Write the proportion equation
   72,016.97 : 99,383.49 = 40,185.18 : x
2. Step 2: Convert to fraction form
   72,016.97/99,383.49 = 40,185.18/x
3. Step 3: Cross multiply
   72,016.97x = 99,383.49 × 40,185.18
4. Step 4: Simplify right side
   72,016.97x = 3,993,743,434.68
5. Step 5: Solve for x
   x = 3,993,743,434.68/72,016.97
6. Step 6: Final answer
   x = 55,455.59