Finding the Fourth Proportional to 80.56, 111.15 and 51.46

Step by Step Solution

1. Step 1: Write the proportion equation
   80.56 : 111.15 = 51.46 : x
2. Step 2: Convert to fraction form
   80.56/111.15 = 51.46/x
3. Step 3: Cross multiply
   80.56x = 111.15 × 51.46
4. Step 4: Simplify right side
   80.56x = 5,719.78
5. Step 5: Solve for x
   x = 5,719.78/80.56
6. Step 6: Final answer
   x = 71.00