Finding the Third Proportional to 42.28 and 56.67

Step by Step Solution

1. Step 1: Write the proportion equation
   42.28 : 56.67 = 56.67 : x
2. Step 2: Convert to fraction form
   42.28/56.67 = 56.67/x
3. Step 3: Cross multiply
   42.28x = 56.67 × 56.67
4. Step 4: Simplify right side
   42.28x = 3,211.70
5. Step 5: Solve for x
   x = 3,211.70/42.28
6. Step 6: Final answer
   x = 75.96