Finding the Fourth Proportional to 131.82, 181.60 and 109.56

Step by Step Solution

1. Step 1: Write the proportion equation
   131.82 : 181.60 = 109.56 : x
2. Step 2: Convert to fraction form
   131.82/181.60 = 109.56/x
3. Step 3: Cross multiply
   131.82x = 181.60 × 109.56
4. Step 4: Simplify right side
   131.82x = 19,896.10
5. Step 5: Solve for x
   x = 19,896.10/131.82
6. Step 6: Final answer
   x = 150.93