Finding the Fourth Proportional to 12,031.27, 18,042.42 and 4,131.55

Step by Step Solution

1. Step 1: Write the proportion equation
   12,031.27 : 18,042.42 = 4,131.55 : x
2. Step 2: Convert to fraction form
   12,031.27/18,042.42 = 4,131.55/x
3. Step 3: Cross multiply
   12,031.27x = 18,042.42 × 4,131.55
4. Step 4: Simplify right side
   12,031.27x = 74,543,160.35
5. Step 5: Solve for x
   x = 74,543,160.35/12,031.27
6. Step 6: Final answer
   x = 6,195.78