Finding the Fourth Proportional to 89.35, 133.98 and 75.71

Step by Step Solution

1. Step 1: Write the proportion equation
   89.35 : 133.98 = 75.71 : x
2. Step 2: Convert to fraction form
   89.35/133.98 = 75.71/x
3. Step 3: Cross multiply
   89.35x = 133.98 × 75.71
4. Step 4: Simplify right side
   89.35x = 10,143.63
5. Step 5: Solve for x
   x = 10,143.63/89.35
6. Step 6: Final answer
   x = 113.53