Finding the Fourth Proportional to 89.27, 123.25 and 83.87

Step by Step Solution

1. Step 1: Write the proportion equation
   89.27 : 123.25 = 83.87 : x
2. Step 2: Convert to fraction form
   89.27/123.25 = 83.87/x
3. Step 3: Cross multiply
   89.27x = 123.25 × 83.87
4. Step 4: Simplify right side
   89.27x = 10,336.98
5. Step 5: Solve for x
   x = 10,336.98/89.27
6. Step 6: Final answer
   x = 115.79