Finding the Fourth Proportional to 12,168.50, 18,245.12 and 5,586.21

Step by Step Solution

1. Step 1: Write the proportion equation
   12,168.50 : 18,245.12 = 5,586.21 : x
2. Step 2: Convert to fraction form
   12,168.50/18,245.12 = 5,586.21/x
3. Step 3: Cross multiply
   12,168.50x = 18,245.12 × 5,586.21
4. Step 4: Simplify right side
   12,168.50x = 101,921,043.86
5. Step 5: Solve for x
   x = 101,921,043.86/12,168.50
6. Step 6: Final answer
   x = 8,375.81