Finding the Fourth Proportional to 85.88, 118.34 and 67.42

Step by Step Solution

1. Step 1: Write the proportion equation
   85.88 : 118.34 = 67.42 : x
2. Step 2: Convert to fraction form
   85.88/118.34 = 67.42/x
3. Step 3: Cross multiply
   85.88x = 118.34 × 67.42
4. Step 4: Simplify right side
   85.88x = 7,978.48
5. Step 5: Solve for x
   x = 7,978.48/85.88
6. Step 6: Final answer
   x = 92.90