Finding the Fourth Proportional to 67.31, 92.94 and 42.79

Step by Step Solution

1. Step 1: Write the proportion equation
   67.31 : 92.94 = 42.79 : x
2. Step 2: Convert to fraction form
   67.31/92.94 = 42.79/x
3. Step 3: Cross multiply
   67.31x = 92.94 × 42.79
4. Step 4: Simplify right side
   67.31x = 3,976.44
5. Step 5: Solve for x
   x = 3,976.44/67.31
6. Step 6: Final answer
   x = 59.08