Finding the Fourth Proportional to 12,111.66, 18,163.17 and 3,789.18

Step by Step Solution

1. Step 1: Write the proportion equation
   12,111.66 : 18,163.17 = 3,789.18 : x
2. Step 2: Convert to fraction form
   12,111.66/18,163.17 = 3,789.18/x
3. Step 3: Cross multiply
   12,111.66x = 18,163.17 × 3,789.18
4. Step 4: Simplify right side
   12,111.66x = 68,823,520.50
5. Step 5: Solve for x
   x = 68,823,520.50/12,111.66
6. Step 6: Final answer
   x = 5,682.42