Finding the Fourth Proportional to 42.42, 58.56 and 38.05

Step by Step Solution

1. Step 1: Write the proportion equation
   42.42 : 58.56 = 38.05 : x
2. Step 2: Convert to fraction form
   42.42/58.56 = 38.05/x
3. Step 3: Cross multiply
   42.42x = 58.56 × 38.05
4. Step 4: Simplify right side
   42.42x = 2,228.21
5. Step 5: Solve for x
   x = 2,228.21/42.42
6. Step 6: Final answer
   x = 52.53