Finding the Fourth Proportional to 89.50, 134.18 and 55.28

Step by Step Solution

1. Step 1: Write the proportion equation
   89.50 : 134.18 = 55.28 : x
2. Step 2: Convert to fraction form
   89.50/134.18 = 55.28/x
3. Step 3: Cross multiply
   89.50x = 134.18 × 55.28
4. Step 4: Simplify right side
   89.50x = 7,417.47
5. Step 5: Solve for x
   x = 7,417.47/89.50
6. Step 6: Final answer
   x = 82.88