Finding the Fourth Proportional to 89.72, 134.27 and 74.53

Step by Step Solution

1. Step 1: Write the proportion equation
   89.72 : 134.27 = 74.53 : x
2. Step 2: Convert to fraction form
   89.72/134.27 = 74.53/x
3. Step 3: Cross multiply
   89.72x = 134.27 × 74.53
4. Step 4: Simplify right side
   89.72x = 10,006.10
5. Step 5: Solve for x
   x = 10,006.10/89.72
6. Step 6: Final answer
   x = 111.53