Finding the Fourth Proportional to 89.42, 133.89 and 69.07

Step by Step Solution

1. Step 1: Write the proportion equation
   89.42 : 133.89 = 69.07 : x
2. Step 2: Convert to fraction form
   89.42/133.89 = 69.07/x
3. Step 3: Cross multiply
   89.42x = 133.89 × 69.07
4. Step 4: Simplify right side
   89.42x = 9,247.78
5. Step 5: Solve for x
   x = 9,247.78/89.42
6. Step 6: Final answer
   x = 103.42