Finding the Fourth Proportional to 123.92, 185.88 and 55.42

Step by Step Solution

1. Step 1: Write the proportion equation
   123.92 : 185.88 = 55.42 : x
2. Step 2: Convert to fraction form
   123.92/185.88 = 55.42/x
3. Step 3: Cross multiply
   123.92x = 185.88 × 55.42
4. Step 4: Simplify right side
   123.92x = 10,301.47
5. Step 5: Solve for x
   x = 10,301.47/123.92
6. Step 6: Final answer
   x = 83.13