Finding the Fourth Proportional to 67.02, 92.42 and 42.47

Step by Step Solution

1. Step 1: Write the proportion equation
   67.02 : 92.42 = 42.47 : x
2. Step 2: Convert to fraction form
   67.02/92.42 = 42.47/x
3. Step 3: Cross multiply
   67.02x = 92.42 × 42.47
4. Step 4: Simplify right side
   67.02x = 3,924.62
5. Step 5: Solve for x
   x = 3,924.62/67.02
6. Step 6: Final answer
   x = 58.56