Finding the Fourth Proportional to 12,144.38, 18,216.60 and 3,379.30

Step by Step Solution

1. Step 1: Write the proportion equation
   12,144.38 : 18,216.60 = 3,379.30 : x
2. Step 2: Convert to fraction form
   12,144.38/18,216.60 = 3,379.30/x
3. Step 3: Cross multiply
   12,144.38x = 18,216.60 × 3,379.30
4. Step 4: Simplify right side
   12,144.38x = 61,559,356.38
5. Step 5: Solve for x
   x = 61,559,356.38/12,144.38
6. Step 6: Final answer
   x = 5,068.96