Finding the Fourth Proportional to 89.82, 134.52 and 74.70

Step by Step Solution

1. Step 1: Write the proportion equation
   89.82 : 134.52 = 74.70 : x
2. Step 2: Convert to fraction form
   89.82/134.52 = 74.70/x
3. Step 3: Cross multiply
   89.82x = 134.52 × 74.70
4. Step 4: Simplify right side
   89.82x = 10,048.64
5. Step 5: Solve for x
   x = 10,048.64/89.82
6. Step 6: Final answer
   x = 111.88