Finding the Fourth Proportional to 86.52, 119.27 and 83.89

Step by Step Solution

1. Step 1: Write the proportion equation
   86.52 : 119.27 = 83.89 : x
2. Step 2: Convert to fraction form
   86.52/119.27 = 83.89/x
3. Step 3: Cross multiply
   86.52x = 119.27 × 83.89
4. Step 4: Simplify right side
   86.52x = 10,005.25
5. Step 5: Solve for x
   x = 10,005.25/86.52
6. Step 6: Final answer
   x = 115.64