Finding the Fourth Proportional to 72.42, 108.60 and 33.89

Step by Step Solution

1. Step 1: Write the proportion equation
   72.42 : 108.60 = 33.89 : x
2. Step 2: Convert to fraction form
   72.42/108.60 = 33.89/x
3. Step 3: Cross multiply
   72.42x = 108.60 × 33.89
4. Step 4: Simplify right side
   72.42x = 3,680.73
5. Step 5: Solve for x
   x = 3,680.73/72.42
6. Step 6: Final answer
   x = 50.82