Finding the Fourth Proportional to 12,078.27, 18,115.29 and 3,311.10

Step by Step Solution

1. Step 1: Write the proportion equation
   12,078.27 : 18,115.29 = 3,311.10 : x
2. Step 2: Convert to fraction form
   12,078.27/18,115.29 = 3,311.10/x
3. Step 3: Cross multiply
   12,078.27x = 18,115.29 × 3,311.10
4. Step 4: Simplify right side
   12,078.27x = 59,981,536.72
5. Step 5: Solve for x
   x = 59,981,536.72/12,078.27
6. Step 6: Final answer
   x = 4,966.07