Finding the Fourth Proportional to 103.89, 155.86 and 35.42

Step by Step Solution

1. Step 1: Write the proportion equation
   103.89 : 155.86 = 35.42 : x
2. Step 2: Convert to fraction form
   103.89/155.86 = 35.42/x
3. Step 3: Cross multiply
   103.89x = 155.86 × 35.42
4. Step 4: Simplify right side
   103.89x = 5,520.56
5. Step 5: Solve for x
   x = 5,520.56/103.89
6. Step 6: Final answer
   x = 53.14