Finding the Fourth Proportional to 89.06, 133.48 and 42.81

Step by Step Solution

1. Step 1: Write the proportion equation
   89.06 : 133.48 = 42.81 : x
2. Step 2: Convert to fraction form
   89.06/133.48 = 42.81/x
3. Step 3: Cross multiply
   89.06x = 133.48 × 42.81
4. Step 4: Simplify right side
   89.06x = 5,714.28
5. Step 5: Solve for x
   x = 5,714.28/89.06
6. Step 6: Final answer
   x = 64.16