Finding the Fourth Proportional to 12,021.39, 18,029.82 and 3,255.15

Step by Step Solution

1. Step 1: Write the proportion equation
   12,021.39 : 18,029.82 = 3,255.15 : x
2. Step 2: Convert to fraction form
   12,021.39/18,029.82 = 3,255.15/x
3. Step 3: Cross multiply
   12,021.39x = 18,029.82 × 3,255.15
4. Step 4: Simplify right side
   12,021.39x = 58,689,768.57
5. Step 5: Solve for x
   x = 58,689,768.57/12,021.39
6. Step 6: Final answer
   x = 4,882.11