Finding the Fourth Proportional to 131.74, 181.69 and 111.06

Step by Step Solution

1. Step 1: Write the proportion equation
   131.74 : 181.69 = 111.06 : x
2. Step 2: Convert to fraction form
   131.74/181.69 = 111.06/x
3. Step 3: Cross multiply
   131.74x = 181.69 × 111.06
4. Step 4: Simplify right side
   131.74x = 20,178.49
5. Step 5: Solve for x
   x = 20,178.49/131.74
6. Step 6: Final answer
   x = 153.17