Finding the Fourth Proportional to 42.42, 63.56 and 30.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42.42 : 63.56 = 30.42 : x
2. Step 2: Convert to fraction form
   42.42/63.56 = 30.42/x
3. Step 3: Cross multiply
   42.42x = 63.56 × 30.42
4. Step 4: Simplify right side
   42.42x = 1,933.50
5. Step 5: Solve for x
   x = 1,933.50/42.42
6. Step 6: Final answer
   x = 45.58