Finding the Fourth Proportional to 11,479.32, 17,221.41 and 4,086.05

Step by Step Solution

1. Step 1: Write the proportion equation
   11,479.32 : 17,221.41 = 4,086.05 : x
2. Step 2: Convert to fraction form
   11,479.32/17,221.41 = 4,086.05/x
3. Step 3: Cross multiply
   11,479.32x = 17,221.41 × 4,086.05
4. Step 4: Simplify right side
   11,479.32x = 70,367,456.22
5. Step 5: Solve for x
   x = 70,367,456.22/11,479.32
6. Step 6: Final answer
   x = 6,129.93