Finding the Fourth Proportional to 123.06, 169.56 and 111.81

Step by Step Solution

1. Step 1: Write the proportion equation
   123.06 : 169.56 = 111.81 : x
2. Step 2: Convert to fraction form
   123.06/169.56 = 111.81/x
3. Step 3: Cross multiply
   123.06x = 169.56 × 111.81
4. Step 4: Simplify right side
   123.06x = 18,958.50
5. Step 5: Solve for x
   x = 18,958.50/123.06
6. Step 6: Final answer
   x = 154.06