Finding the Fourth Proportional to 104.27, 143.82 and 83.57

Step by Step Solution

1. Step 1: Write the proportion equation
   104.27 : 143.82 = 83.57 : x
2. Step 2: Convert to fraction form
   104.27/143.82 = 83.57/x
3. Step 3: Cross multiply
   104.27x = 143.82 × 83.57
4. Step 4: Simplify right side
   104.27x = 12,019.04
5. Step 5: Solve for x
   x = 12,019.04/104.27
6. Step 6: Final answer
   x = 115.27