Finding the Fourth Proportional to 158.10, 237.15 and 42.55

Step by Step Solution

1. Step 1: Write the proportion equation
   158.10 : 237.15 = 42.55 : x
2. Step 2: Convert to fraction form
   158.10/237.15 = 42.55/x
3. Step 3: Cross multiply
   158.10x = 237.15 × 42.55
4. Step 4: Simplify right side
   158.10x = 10,089.33
5. Step 5: Solve for x
   x = 10,089.33/158.10
6. Step 6: Final answer
   x = 63.82