Finding the Fourth Proportional to 8,086.76, 12,129.32 and 2,540.16

Step by Step Solution

1. Step 1: Write the proportion equation
   8,086.76 : 12,129.32 = 2,540.16 : x
2. Step 2: Convert to fraction form
   8,086.76/12,129.32 = 2,540.16/x
3. Step 3: Cross multiply
   8,086.76x = 12,129.32 × 2,540.16
4. Step 4: Simplify right side
   8,086.76x = 30,810,413.49
5. Step 5: Solve for x
   x = 30,810,413.49/8,086.76
6. Step 6: Final answer
   x = 3,809.98