Finding the Fourth Proportional to 67.72, 101.73 and 42.05

Step by Step Solution

1. Step 1: Write the proportion equation
   67.72 : 101.73 = 42.05 : x
2. Step 2: Convert to fraction form
   67.72/101.73 = 42.05/x
3. Step 3: Cross multiply
   67.72x = 101.73 × 42.05
4. Step 4: Simplify right side
   67.72x = 4,277.75
5. Step 5: Solve for x
   x = 4,277.75/67.72
6. Step 6: Final answer
   x = 63.17