Finding the Fourth Proportional to 86.10, 118.82 and 59.86

Step by Step Solution

1. Step 1: Write the proportion equation
   86.10 : 118.82 = 59.86 : x
2. Step 2: Convert to fraction form
   86.10/118.82 = 59.86/x
3. Step 3: Cross multiply
   86.10x = 118.82 × 59.86
4. Step 4: Simplify right side
   86.10x = 7,112.86
5. Step 5: Solve for x
   x = 7,112.86/86.10
6. Step 6: Final answer
   x = 82.62