Finding the Fourth Proportional to 89.94, 134.69 and 69.45

Step by Step Solution

1. Step 1: Write the proportion equation
   89.94 : 134.69 = 69.45 : x
2. Step 2: Convert to fraction form
   89.94/134.69 = 69.45/x
3. Step 3: Cross multiply
   89.94x = 134.69 × 69.45
4. Step 4: Simplify right side
   89.94x = 9,353.37
5. Step 5: Solve for x
   x = 9,353.37/89.94
6. Step 6: Final answer
   x = 103.99