Finding the Fourth Proportional to 67.91, 101.88 and 42.24

Step by Step Solution

1. Step 1: Write the proportion equation
   67.91 : 101.88 = 42.24 : x
2. Step 2: Convert to fraction form
   67.91/101.88 = 42.24/x
3. Step 3: Cross multiply
   67.91x = 101.88 × 42.24
4. Step 4: Simplify right side
   67.91x = 4,303.41
5. Step 5: Solve for x
   x = 4,303.41/67.91
6. Step 6: Final answer
   x = 63.37