Finding the Fourth Proportional to 42.68, 58.89 and 30.42

Step by Step Solution

1. Step 1: Write the proportion equation
   42.68 : 58.89 = 30.42 : x
2. Step 2: Convert to fraction form
   42.68/58.89 = 30.42/x
3. Step 3: Cross multiply
   42.68x = 58.89 × 30.42
4. Step 4: Simplify right side
   42.68x = 1,791.77
5. Step 5: Solve for x
   x = 1,791.77/42.68
6. Step 6: Final answer
   x = 41.98