Finding the Fourth Proportional to 42.50, 63.56 and 38.18

Step by Step Solution

1. Step 1: Write the proportion equation
   42.50 : 63.56 = 38.18 : x
2. Step 2: Convert to fraction form
   42.50/63.56 = 38.18/x
3. Step 3: Cross multiply
   42.50x = 63.56 × 38.18
4. Step 4: Simplify right side
   42.50x = 2,426.72
5. Step 5: Solve for x
   x = 2,426.72/42.50
6. Step 6: Final answer
   x = 57.10