Finding the Fourth Proportional to 100.58, 150.82 and 28.42

Step by Step Solution

1. Step 1: Write the proportion equation
   100.58 : 150.82 = 28.42 : x
2. Step 2: Convert to fraction form
   100.58/150.82 = 28.42/x
3. Step 3: Cross multiply
   100.58x = 150.82 × 28.42
4. Step 4: Simplify right side
   100.58x = 4,285.86
5. Step 5: Solve for x
   x = 4,285.86/100.58
6. Step 6: Final answer
   x = 42.61