Finding the Fourth Proportional to 11,839.78, 17,757.42 and 3,941.11

Step by Step Solution

1. Step 1: Write the proportion equation
   11,839.78 : 17,757.42 = 3,941.11 : x
2. Step 2: Convert to fraction form
   11,839.78/17,757.42 = 3,941.11/x
3. Step 3: Cross multiply
   11,839.78x = 17,757.42 × 3,941.11
4. Step 4: Simplify right side
   11,839.78x = 69,983,945.54
5. Step 5: Solve for x
   x = 69,983,945.54/11,839.78
6. Step 6: Final answer
   x = 5,910.92