Finding the Fourth Proportional to 42.89, 58.75 and 42.30

Step by Step Solution

1. Step 1: Write the proportion equation
   42.89 : 58.75 = 42.30 : x
2. Step 2: Convert to fraction form
   42.89/58.75 = 42.30/x
3. Step 3: Cross multiply
   42.89x = 58.75 × 42.30
4. Step 4: Simplify right side
   42.89x = 2,485.02
5. Step 5: Solve for x
   x = 2,485.02/42.89
6. Step 6: Final answer
   x = 57.95