Finding the Fourth Proportional to 8,083.76, 12,120.78 and 3,086.46

Step by Step Solution

1. Step 1: Write the proportion equation
   8,083.76 : 12,120.78 = 3,086.46 : x
2. Step 2: Convert to fraction form
   8,083.76/12,120.78 = 3,086.46/x
3. Step 3: Cross multiply
   8,083.76x = 12,120.78 × 3,086.46
4. Step 4: Simplify right side
   8,083.76x = 37,410,302.64
5. Step 5: Solve for x
   x = 37,410,302.64/8,083.76
6. Step 6: Final answer
   x = 4,627.83