Finding the Fourth Proportional to 89.81, 134.71 and 44.15

Step by Step Solution

1. Step 1: Write the proportion equation
   89.81 : 134.71 = 44.15 : x
2. Step 2: Convert to fraction form
   89.81/134.71 = 44.15/x
3. Step 3: Cross multiply
   89.81x = 134.71 × 44.15
4. Step 4: Simplify right side
   89.81x = 5,946.83
5. Step 5: Solve for x
   x = 5,946.83/89.81
6. Step 6: Final answer
   x = 66.21