Finding the Fourth Proportional to 8,131.59, 11,221.59 and 4,405.59

Step by Step Solution

1. Step 1: Write the proportion equation
   8,131.59 : 11,221.59 = 4,405.59 : x
2. Step 2: Convert to fraction form
   8,131.59/11,221.59 = 4,405.59/x
3. Step 3: Cross multiply
   8,131.59x = 11,221.59 × 4,405.59
4. Step 4: Simplify right side
   8,131.59x = 49,437,668.58
5. Step 5: Solve for x
   x = 49,437,668.58/8,131.59
6. Step 6: Final answer
   x = 6,079.71