Finding the Fourth Proportional to 80.83, 111.49 and 51.33

Step by Step Solution

1. Step 1: Write the proportion equation
   80.83 : 111.49 = 51.33 : x
2. Step 2: Convert to fraction form
   80.83/111.49 = 51.33/x
3. Step 3: Cross multiply
   80.83x = 111.49 × 51.33
4. Step 4: Simplify right side
   80.83x = 5,722.78
5. Step 5: Solve for x
   x = 5,722.78/80.83
6. Step 6: Final answer
   x = 70.80