Finding the Fourth Proportional to 8,059.54, 12,086.88 and 3,128.08

Step by Step Solution

1. Step 1: Write the proportion equation
   8,059.54 : 12,086.88 = 3,128.08 : x
2. Step 2: Convert to fraction form
   8,059.54/12,086.88 = 3,128.08/x
3. Step 3: Cross multiply
   8,059.54x = 12,086.88 × 3,128.08
4. Step 4: Simplify right side
   8,059.54x = 37,808,727.59
5. Step 5: Solve for x
   x = 37,808,727.59/8,059.54
6. Step 6: Final answer
   x = 4,691.18