Finding the Fourth Proportional to 12,187.16, 18,278.42 and 5,940.89

Step by Step Solution

1. Step 1: Write the proportion equation
   12,187.16 : 18,278.42 = 5,940.89 : x
2. Step 2: Convert to fraction form
   12,187.16/18,278.42 = 5,940.89/x
3. Step 3: Cross multiply
   12,187.16x = 18,278.42 × 5,940.89
4. Step 4: Simplify right side
   12,187.16x = 108,590,082.59
5. Step 5: Solve for x
   x = 108,590,082.59/12,187.16
6. Step 6: Final answer
   x = 8,910.21