Finding the Fourth Proportional to 11,993.40, 17,989.83 and 3,228.42

Step by Step Solution

1. Step 1: Write the proportion equation
   11,993.40 : 17,989.83 = 3,228.42 : x
2. Step 2: Convert to fraction form
   11,993.40/17,989.83 = 3,228.42/x
3. Step 3: Cross multiply
   11,993.40x = 17,989.83 × 3,228.42
4. Step 4: Simplify right side
   11,993.40x = 58,078,726.97
5. Step 5: Solve for x
   x = 58,078,726.97/11,993.40
6. Step 6: Final answer
   x = 4,842.56