Finding the Fourth Proportional to 8,086.64, 12,131.37 and 3,929.51

Step by Step Solution

1. Step 1: Write the proportion equation
   8,086.64 : 12,131.37 = 3,929.51 : x
2. Step 2: Convert to fraction form
   8,086.64/12,131.37 = 3,929.51/x
3. Step 3: Cross multiply
   8,086.64x = 12,131.37 × 3,929.51
4. Step 4: Simplify right side
   8,086.64x = 47,670,370.06
5. Step 5: Solve for x
   x = 47,670,370.06/8,086.64
6. Step 6: Final answer
   x = 5,894.96