Finding the Fourth Proportional to 83.46, 124.34 and 80.56

Step by Step Solution

1. Step 1: Write the proportion equation
   83.46 : 124.34 = 80.56 : x
2. Step 2: Convert to fraction form
   83.46/124.34 = 80.56/x
3. Step 3: Cross multiply
   83.46x = 124.34 × 80.56
4. Step 4: Simplify right side
   83.46x = 10,016.83
5. Step 5: Solve for x
   x = 10,016.83/83.46
6. Step 6: Final answer
   x = 120.02