Finding the Fourth Proportional to 42.48, 58.24 and 42.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42.48 : 58.24 = 42.02 : x
2. Step 2: Convert to fraction form
   42.48/58.24 = 42.02/x
3. Step 3: Cross multiply
   42.48x = 58.24 × 42.02
4. Step 4: Simplify right side
   42.48x = 2,447.24
5. Step 5: Solve for x
   x = 2,447.24/42.48
6. Step 6: Final answer
   x = 57.61