Finding the Fourth Proportional to 89.28, 134.03 and 71.93

Step by Step Solution

1. Step 1: Write the proportion equation
   89.28 : 134.03 = 71.93 : x
2. Step 2: Convert to fraction form
   89.28/134.03 = 71.93/x
3. Step 3: Cross multiply
   89.28x = 134.03 × 71.93
4. Step 4: Simplify right side
   89.28x = 9,640.78
5. Step 5: Solve for x
   x = 9,640.78/89.28
6. Step 6: Final answer
   x = 107.99