Finding the Fourth Proportional to 123.43, 185.15 and 42.27

Step by Step Solution

1. Step 1: Write the proportion equation
   123.43 : 185.15 = 42.27 : x
2. Step 2: Convert to fraction form
   123.43/185.15 = 42.27/x
3. Step 3: Cross multiply
   123.43x = 185.15 × 42.27
4. Step 4: Simplify right side
   123.43x = 7,825.62
5. Step 5: Solve for x
   x = 7,825.62/123.43
6. Step 6: Final answer
   x = 63.40