Finding the Fourth Proportional to 12,429.50, 18,644.83 and 4,109.31

Step by Step Solution

1. Step 1: Write the proportion equation
   12,429.50 : 18,644.83 = 4,109.31 : x
2. Step 2: Convert to fraction form
   12,429.50/18,644.83 = 4,109.31/x
3. Step 3: Cross multiply
   12,429.50x = 18,644.83 × 4,109.31
4. Step 4: Simplify right side
   12,429.50x = 76,617,376.09
5. Step 5: Solve for x
   x = 76,617,376.09/12,429.50
6. Step 6: Final answer
   x = 6,164.16