Finding the Fourth Proportional to 103.83, 155.82 and 42.96

Step by Step Solution

1. Step 1: Write the proportion equation
   103.83 : 155.82 = 42.96 : x
2. Step 2: Convert to fraction form
   103.83/155.82 = 42.96/x
3. Step 3: Cross multiply
   103.83x = 155.82 × 42.96
4. Step 4: Simplify right side
   103.83x = 6,694.03
5. Step 5: Solve for x
   x = 6,694.03/103.83
6. Step 6: Final answer
   x = 64.47