Finding the Fourth Proportional to 42.67, 58.71 and 42.58

Step by Step Solution

1. Step 1: Write the proportion equation
   42.67 : 58.71 = 42.58 : x
2. Step 2: Convert to fraction form
   42.67/58.71 = 42.58/x
3. Step 3: Cross multiply
   42.67x = 58.71 × 42.58
4. Step 4: Simplify right side
   42.67x = 2,499.87
5. Step 5: Solve for x
   x = 2,499.87/42.67
6. Step 6: Final answer
   x = 58.59