Finding the Fourth Proportional to 103.83, 155.72 and 42.16

Step by Step Solution

1. Step 1: Write the proportion equation
   103.83 : 155.72 = 42.16 : x
2. Step 2: Convert to fraction form
   103.83/155.72 = 42.16/x
3. Step 3: Cross multiply
   103.83x = 155.72 × 42.16
4. Step 4: Simplify right side
   103.83x = 6,565.16
5. Step 5: Solve for x
   x = 6,565.16/103.83
6. Step 6: Final answer
   x = 63.23