Finding the Fourth Proportional to 12,055.72, 18,081.15 and 3,289.90

Step by Step Solution

1. Step 1: Write the proportion equation
   12,055.72 : 18,081.15 = 3,289.90 : x
2. Step 2: Convert to fraction form
   12,055.72/18,081.15 = 3,289.90/x
3. Step 3: Cross multiply
   12,055.72x = 18,081.15 × 3,289.90
4. Step 4: Simplify right side
   12,055.72x = 59,485,175.39
5. Step 5: Solve for x
   x = 59,485,175.39/12,055.72
6. Step 6: Final answer
   x = 4,934.19