Finding the Fourth Proportional to 42.74, 58.82 and 42.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42.74 : 58.82 = 42.02 : x
2. Step 2: Convert to fraction form
   42.74/58.82 = 42.02/x
3. Step 3: Cross multiply
   42.74x = 58.82 × 42.02
4. Step 4: Simplify right side
   42.74x = 2,471.62
5. Step 5: Solve for x
   x = 2,471.62/42.74
6. Step 6: Final answer
   x = 57.83