Finding the Fourth Proportional to 80.52, 120.76 and 42.52

Step by Step Solution

1. Step 1: Write the proportion equation
   80.52 : 120.76 = 42.52 : x
2. Step 2: Convert to fraction form
   80.52/120.76 = 42.52/x
3. Step 3: Cross multiply
   80.52x = 120.76 × 42.52
4. Step 4: Simplify right side
   80.52x = 5,134.72
5. Step 5: Solve for x
   x = 5,134.72/80.52
6. Step 6: Final answer
   x = 63.77