Finding the Fourth Proportional to 12,144.78, 18,217.06 and 3,379.67

Step by Step Solution

1. Step 1: Write the proportion equation
   12,144.78 : 18,217.06 = 3,379.67 : x
2. Step 2: Convert to fraction form
   12,144.78/18,217.06 = 3,379.67/x
3. Step 3: Cross multiply
   12,144.78x = 18,217.06 × 3,379.67
4. Step 4: Simplify right side
   12,144.78x = 61,567,688.26
5. Step 5: Solve for x
   x = 61,567,688.26/12,144.78
6. Step 6: Final answer
   x = 5,069.48