Finding the Fourth Proportional to 8,086.50, 12,143.25 and 7,480.35

Step by Step Solution

1. Step 1: Write the proportion equation
   8,086.50 : 12,143.25 = 7,480.35 : x
2. Step 2: Convert to fraction form
   8,086.50/12,143.25 = 7,480.35/x
3. Step 3: Cross multiply
   8,086.50x = 12,143.25 × 7,480.35
4. Step 4: Simplify right side
   8,086.50x = 90,835,760.14
5. Step 5: Solve for x
   x = 90,835,760.14/8,086.50
6. Step 6: Final answer
   x = 11,233.01