Finding the Fourth Proportional to 86.89, 119.82 and 59.28

Step by Step Solution

1. Step 1: Write the proportion equation
   86.89 : 119.82 = 59.28 : x
2. Step 2: Convert to fraction form
   86.89/119.82 = 59.28/x
3. Step 3: Cross multiply
   86.89x = 119.82 × 59.28
4. Step 4: Simplify right side
   86.89x = 7,102.93
5. Step 5: Solve for x
   x = 7,102.93/86.89
6. Step 6: Final answer
   x = 81.75