Finding the Fourth Proportional to 73.78, 110.72 and 33.18

Step by Step Solution

1. Step 1: Write the proportion equation
   73.78 : 110.72 = 33.18 : x
2. Step 2: Convert to fraction form
   73.78/110.72 = 33.18/x
3. Step 3: Cross multiply
   73.78x = 110.72 × 33.18
4. Step 4: Simplify right side
   73.78x = 3,673.69
5. Step 5: Solve for x
   x = 3,673.69/73.78
6. Step 6: Final answer
   x = 49.79