Finding the Fourth Proportional to 132.30, 181.71 and 111.31

Step by Step Solution

1. Step 1: Write the proportion equation
   132.30 : 181.71 = 111.31 : x
2. Step 2: Convert to fraction form
   132.30/181.71 = 111.31/x
3. Step 3: Cross multiply
   132.30x = 181.71 × 111.31
4. Step 4: Simplify right side
   132.30x = 20,225.69
5. Step 5: Solve for x
   x = 20,225.69/132.30
6. Step 6: Final answer
   x = 152.88