Finding the Fourth Proportional to 103.83, 155.57 and 73.31

Step by Step Solution

1. Step 1: Write the proportion equation
   103.83 : 155.57 = 73.31 : x
2. Step 2: Convert to fraction form
   103.83/155.57 = 73.31/x
3. Step 3: Cross multiply
   103.83x = 155.57 × 73.31
4. Step 4: Simplify right side
   103.83x = 11,404.10
5. Step 5: Solve for x
   x = 11,404.10/103.83
6. Step 6: Final answer
   x = 109.83