Finding the Fourth Proportional to 131.56, 181.52 and 111.97

Step by Step Solution

1. Step 1: Write the proportion equation
   131.56 : 181.52 = 111.97 : x
2. Step 2: Convert to fraction form
   131.56/181.52 = 111.97/x
3. Step 3: Cross multiply
   131.56x = 181.52 × 111.97
4. Step 4: Simplify right side
   131.56x = 20,323.89
5. Step 5: Solve for x
   x = 20,323.89/131.56
6. Step 6: Final answer
   x = 154.49