Finding the Fourth Proportional to 12,144.76, 18,215.78 and 3,260.96

Step by Step Solution

1. Step 1: Write the proportion equation
   12,144.76 : 18,215.78 = 3,260.96 : x
2. Step 2: Convert to fraction form
   12,144.76/18,215.78 = 3,260.96/x
3. Step 3: Cross multiply
   12,144.76x = 18,215.78 × 3,260.96
4. Step 4: Simplify right side
   12,144.76x = 59,400,929.95
5. Step 5: Solve for x
   x = 59,400,929.95/12,144.76
6. Step 6: Final answer
   x = 4,891.07