Finding the Fourth Proportional to 104.89, 144.84 and 83.16

Step by Step Solution

1. Step 1: Write the proportion equation
   104.89 : 144.84 = 83.16 : x
2. Step 2: Convert to fraction form
   104.89/144.84 = 83.16/x
3. Step 3: Cross multiply
   104.89x = 144.84 × 83.16
4. Step 4: Simplify right side
   104.89x = 12,044.89
5. Step 5: Solve for x
   x = 12,044.89/104.89
6. Step 6: Final answer
   x = 114.83