Finding the Fourth Proportional to 11,879.69, 17,819.15 and 5,644.18

Step by Step Solution

1. Step 1: Write the proportion equation
   11,879.69 : 17,819.15 = 5,644.18 : x
2. Step 2: Convert to fraction form
   11,879.69/17,819.15 = 5,644.18/x
3. Step 3: Cross multiply
   11,879.69x = 17,819.15 × 5,644.18
4. Step 4: Simplify right side
   11,879.69x = 100,574,417.28
5. Step 5: Solve for x
   x = 100,574,417.28/11,879.69
6. Step 6: Final answer
   x = 8,466.08