Finding the Fourth Proportional to 11,447.39, 17,171.78 and 3,550.66

Step by Step Solution

1. Step 1: Write the proportion equation
   11,447.39 : 17,171.78 = 3,550.66 : x
2. Step 2: Convert to fraction form
   11,447.39/17,171.78 = 3,550.66/x
3. Step 3: Cross multiply
   11,447.39x = 17,171.78 × 3,550.66
4. Step 4: Simplify right side
   11,447.39x = 60,971,091.69
5. Step 5: Solve for x
   x = 60,971,091.69/11,447.39
6. Step 6: Final answer
   x = 5,326.20