Finding the Fourth Proportional to 89.52, 134.52 and 75.15

Step by Step Solution

1. Step 1: Write the proportion equation
   89.52 : 134.52 = 75.15 : x
2. Step 2: Convert to fraction form
   89.52/134.52 = 75.15/x
3. Step 3: Cross multiply
   89.52x = 134.52 × 75.15
4. Step 4: Simplify right side
   89.52x = 10,109.18
5. Step 5: Solve for x
   x = 10,109.18/89.52
6. Step 6: Final answer
   x = 112.93