Finding the Fourth Proportional to 123.96, 185.81 and 55.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123.96 : 185.81 = 55.42 : x
2. Step 2: Convert to fraction form
   123.96/185.81 = 55.42/x
3. Step 3: Cross multiply
   123.96x = 185.81 × 55.42
4. Step 4: Simplify right side
   123.96x = 10,297.59
5. Step 5: Solve for x
   x = 10,297.59/123.96
6. Step 6: Final answer
   x = 83.08