Finding the Fourth Proportional to 67.42, 93.06 and 42.85

Step by Step Solution

1. Step 1: Write the proportion equation
   67.42 : 93.06 = 42.85 : x
2. Step 2: Convert to fraction form
   67.42/93.06 = 42.85/x
3. Step 3: Cross multiply
   67.42x = 93.06 × 42.85
4. Step 4: Simplify right side
   67.42x = 3,987.62
5. Step 5: Solve for x
   x = 3,987.62/67.42
6. Step 6: Final answer
   x = 59.15