Finding the Fourth Proportional to 11,879.33, 17,818.59 and 5,643.81

Step by Step Solution

1. Step 1: Write the proportion equation
   11,879.33 : 17,818.59 = 5,643.81 : x
2. Step 2: Convert to fraction form
   11,879.33/17,818.59 = 5,643.81/x
3. Step 3: Cross multiply
   11,879.33x = 17,818.59 × 5,643.81
4. Step 4: Simplify right side
   11,879.33x = 100,564,736.43
5. Step 5: Solve for x
   x = 100,564,736.43/11,879.33
6. Step 6: Final answer
   x = 8,465.53