Finding the Fourth Proportional to 12,112.29, 18,168.57 and 4,321.71

Step by Step Solution

1. Step 1: Write the proportion equation
   12,112.29 : 18,168.57 = 4,321.71 : x
2. Step 2: Convert to fraction form
   12,112.29/18,168.57 = 4,321.71/x
3. Step 3: Cross multiply
   12,112.29x = 18,168.57 × 4,321.71
4. Step 4: Simplify right side
   12,112.29x = 78,519,290.65
5. Step 5: Solve for x
   x = 78,519,290.65/12,112.29
6. Step 6: Final answer
   x = 6,482.61