Finding the Fourth Proportional to 103.83, 143.31 and 83.09

Step by Step Solution

1. Step 1: Write the proportion equation
   103.83 : 143.31 = 83.09 : x
2. Step 2: Convert to fraction form
   103.83/143.31 = 83.09/x
3. Step 3: Cross multiply
   103.83x = 143.31 × 83.09
4. Step 4: Simplify right side
   103.83x = 11,908.30
5. Step 5: Solve for x
   x = 11,908.30/103.83
6. Step 6: Final answer
   x = 114.69