Finding the Fourth Proportional to 8,128.55, 11,216.88 and 4,591.69

Step by Step Solution

1. Step 1: Write the proportion equation
   8,128.55 : 11,216.88 = 4,591.69 : x
2. Step 2: Convert to fraction form
   8,128.55/11,216.88 = 4,591.69/x
3. Step 3: Cross multiply
   8,128.55x = 11,216.88 × 4,591.69
4. Step 4: Simplify right side
   8,128.55x = 51,504,407.69
5. Step 5: Solve for x
   x = 51,504,407.69/8,128.55
6. Step 6: Final answer
   x = 6,336.23