Finding the Fourth Proportional to 123.57, 185.37 and 42.38

Step by Step Solution

1. Step 1: Write the proportion equation
   123.57 : 185.37 = 42.38 : x
2. Step 2: Convert to fraction form
   123.57/185.37 = 42.38/x
3. Step 3: Cross multiply
   123.57x = 185.37 × 42.38
4. Step 4: Simplify right side
   123.57x = 7,856.44
5. Step 5: Solve for x
   x = 7,856.44/123.57
6. Step 6: Final answer
   x = 63.58