Finding the Fourth Proportional to 86.18, 118.89 and 59.96

Step by Step Solution

1. Step 1: Write the proportion equation
   86.18 : 118.89 = 59.96 : x
2. Step 2: Convert to fraction form
   86.18/118.89 = 59.96/x
3. Step 3: Cross multiply
   86.18x = 118.89 × 59.96
4. Step 4: Simplify right side
   86.18x = 7,128.94
5. Step 5: Solve for x
   x = 7,128.94/86.18
6. Step 6: Final answer
   x = 82.73