Finding the Fourth Proportional to 12,123, 18,183.96 and 4,227.34

Step by Step Solution

1. Step 1: Write the proportion equation
   12,123 : 18,183.96 = 4,227.34 : x
2. Step 2: Convert to fraction form
   12,123/18,183.96 = 4,227.34/x
3. Step 3: Cross multiply
   12,123x = 18,183.96 × 4,227.34
4. Step 4: Simplify right side
   12,123x = 76,869,781.47
5. Step 5: Solve for x
   x = 76,869,781.47/12,123
6. Step 6: Final answer
   x = 6,340.82