Finding the Fourth Proportional to 67.88, 101.81 and 42.23

Step by Step Solution

1. Step 1: Write the proportion equation
   67.88 : 101.81 = 42.23 : x
2. Step 2: Convert to fraction form
   67.88/101.81 = 42.23/x
3. Step 3: Cross multiply
   67.88x = 101.81 × 42.23
4. Step 4: Simplify right side
   67.88x = 4,298.72
5. Step 5: Solve for x
   x = 4,298.72/67.88
6. Step 6: Final answer
   x = 63.33