Finding the Fourth Proportional to 12,042.42, 18,091.32 and 8,541.09

Step by Step Solution

1. Step 1: Write the proportion equation
   12,042.42 : 18,091.32 = 8,541.09 : x
2. Step 2: Convert to fraction form
   12,042.42/18,091.32 = 8,541.09/x
3. Step 3: Cross multiply
   12,042.42x = 18,091.32 × 8,541.09
4. Step 4: Simplify right side
   12,042.42x = 154,519,592.34
5. Step 5: Solve for x
   x = 154,519,592.34/12,042.42
6. Step 6: Final answer
   x = 12,831.27