Finding the Fourth Proportional to 8,081.55, 12,111.86 and 3,689.33

Step by Step Solution

1. Step 1: Write the proportion equation
   8,081.55 : 12,111.86 = 3,689.33 : x
2. Step 2: Convert to fraction form
   8,081.55/12,111.86 = 3,689.33/x
3. Step 3: Cross multiply
   8,081.55x = 12,111.86 × 3,689.33
4. Step 4: Simplify right side
   8,081.55x = 44,684,569.45
5. Step 5: Solve for x
   x = 44,684,569.45/8,081.55
6. Step 6: Final answer
   x = 5,529.21