Finding the Fourth Proportional to 12,144.33, 18,215.91 and 3,379.05

Step by Step Solution

1. Step 1: Write the proportion equation
   12,144.33 : 18,215.91 = 3,379.05 : x
2. Step 2: Convert to fraction form
   12,144.33/18,215.91 = 3,379.05/x
3. Step 3: Cross multiply
   12,144.33x = 18,215.91 × 3,379.05
4. Step 4: Simplify right side
   12,144.33x = 61,552,470.69
5. Step 5: Solve for x
   x = 61,552,470.69/12,144.33
6. Step 6: Final answer
   x = 5,068.41