Finding the Fourth Proportional to 42.10, 63.18 and 38.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42.10 : 63.18 = 38.02 : x
2. Step 2: Convert to fraction form
   42.10/63.18 = 38.02/x
3. Step 3: Cross multiply
   42.10x = 63.18 × 38.02
4. Step 4: Simplify right side
   42.10x = 2,402.10
5. Step 5: Solve for x
   x = 2,402.10/42.10
6. Step 6: Final answer
   x = 57.06