Finding the Fourth Proportional to 89.82, 134.79 and 68.18

Step by Step Solution

1. Step 1: Write the proportion equation
   89.82 : 134.79 = 68.18 : x
2. Step 2: Convert to fraction form
   89.82/134.79 = 68.18/x
3. Step 3: Cross multiply
   89.82x = 134.79 × 68.18
4. Step 4: Simplify right side
   89.82x = 9,189.31
5. Step 5: Solve for x
   x = 9,189.31/89.82
6. Step 6: Final answer
   x = 102.31