Finding the Fourth Proportional to 72.72, 108.88 and 60.74

Step by Step Solution

1. Step 1: Write the proportion equation
   72.72 : 108.88 = 60.74 : x
2. Step 2: Convert to fraction form
   72.72/108.88 = 60.74/x
3. Step 3: Cross multiply
   72.72x = 108.88 × 60.74
4. Step 4: Simplify right side
   72.72x = 6,613.37
5. Step 5: Solve for x
   x = 6,613.37/72.72
6. Step 6: Final answer
   x = 90.94