Finding the Fourth Proportional to 80.48, 111.05 and 52.86

Step by Step Solution

1. Step 1: Write the proportion equation
   80.48 : 111.05 = 52.86 : x
2. Step 2: Convert to fraction form
   80.48/111.05 = 52.86/x
3. Step 3: Cross multiply
   80.48x = 111.05 × 52.86
4. Step 4: Simplify right side
   80.48x = 5,870.10
5. Step 5: Solve for x
   x = 5,870.10/80.48
6. Step 6: Final answer
   x = 72.94