Finding the Fourth Proportional to 106.28, 146.50 and 69.42

Step by Step Solution

1. Step 1: Write the proportion equation
   106.28 : 146.50 = 69.42 : x
2. Step 2: Convert to fraction form
   106.28/146.50 = 69.42/x
3. Step 3: Cross multiply
   106.28x = 146.50 × 69.42
4. Step 4: Simplify right side
   106.28x = 10,170.03
5. Step 5: Solve for x
   x = 10,170.03/106.28
6. Step 6: Final answer
   x = 95.69