Finding the Fourth Proportional to 12,016.20, 18,021.54 and 3,251.79

Step by Step Solution

1. Step 1: Write the proportion equation
   12,016.20 : 18,021.54 = 3,251.79 : x
2. Step 2: Convert to fraction form
   12,016.20/18,021.54 = 3,251.79/x
3. Step 3: Cross multiply
   12,016.20x = 18,021.54 × 3,251.79
4. Step 4: Simplify right side
   12,016.20x = 58,602,263.56
5. Step 5: Solve for x
   x = 58,602,263.56/12,016.20
6. Step 6: Final answer
   x = 4,876.94