Finding the Fourth Proportional to 37.42, 56.15 and 18.18

Step by Step Solution

1. Step 1: Write the proportion equation
   37.42 : 56.15 = 18.18 : x
2. Step 2: Convert to fraction form
   37.42/56.15 = 18.18/x
3. Step 3: Cross multiply
   37.42x = 56.15 × 18.18
4. Step 4: Simplify right side
   37.42x = 1,020.72
5. Step 5: Solve for x
   x = 1,020.72/37.42
6. Step 6: Final answer
   x = 27.28