Finding the Fourth Proportional to 67.91, 101.42 and 60.72

Step by Step Solution

1. Step 1: Write the proportion equation
   67.91 : 101.42 = 60.72 : x
2. Step 2: Convert to fraction form
   67.91/101.42 = 60.72/x
3. Step 3: Cross multiply
   67.91x = 101.42 × 60.72
4. Step 4: Simplify right side
   67.91x = 6,158.37
5. Step 5: Solve for x
   x = 6,158.37/67.91
6. Step 6: Final answer
   x = 90.69