Finding the Fourth Proportional to 11,787.36, 17,674.56 and 3,993.12

Step by Step Solution

1. Step 1: Write the proportion equation
   11,787.36 : 17,674.56 = 3,993.12 : x
2. Step 2: Convert to fraction form
   11,787.36/17,674.56 = 3,993.12/x
3. Step 3: Cross multiply
   11,787.36x = 17,674.56 × 3,993.12
4. Step 4: Simplify right side
   11,787.36x = 70,576,639.03
5. Step 5: Solve for x
   x = 70,576,639.03/11,787.36
6. Step 6: Final answer
   x = 5,987.48