Finding the Fourth Proportional to 12,056.78, 18,082.80 and 3,289.61

Step by Step Solution

1. Step 1: Write the proportion equation
   12,056.78 : 18,082.80 = 3,289.61 : x
2. Step 2: Convert to fraction form
   12,056.78/18,082.80 = 3,289.61/x
3. Step 3: Cross multiply
   12,056.78x = 18,082.80 × 3,289.61
4. Step 4: Simplify right side
   12,056.78x = 59,485,269.29
5. Step 5: Solve for x
   x = 59,485,269.29/12,056.78
6. Step 6: Final answer
   x = 4,933.76