Finding the Fourth Proportional to 89.96, 134.72 and 75.60

Step by Step Solution

1. Step 1: Write the proportion equation
   89.96 : 134.72 = 75.60 : x
2. Step 2: Convert to fraction form
   89.96/134.72 = 75.60/x
3. Step 3: Cross multiply
   89.96x = 134.72 × 75.60
4. Step 4: Simplify right side
   89.96x = 10,184.83
5. Step 5: Solve for x
   x = 10,184.83/89.96
6. Step 6: Final answer
   x = 113.22