Finding the Fourth Proportional to 80.34, 110.88 and 52.72

Step by Step Solution

1. Step 1: Write the proportion equation
   80.34 : 110.88 = 52.72 : x
2. Step 2: Convert to fraction form
   80.34/110.88 = 52.72/x
3. Step 3: Cross multiply
   80.34x = 110.88 × 52.72
4. Step 4: Simplify right side
   80.34x = 5,845.59
5. Step 5: Solve for x
   x = 5,845.59/80.34
6. Step 6: Final answer
   x = 72.76