Finding the Fourth Proportional to 42.79, 58.65 and 42.01

Step by Step Solution

1. Step 1: Write the proportion equation
   42.79 : 58.65 = 42.01 : x
2. Step 2: Convert to fraction form
   42.79/58.65 = 42.01/x
3. Step 3: Cross multiply
   42.79x = 58.65 × 42.01
4. Step 4: Simplify right side
   42.79x = 2,464.04
5. Step 5: Solve for x
   x = 2,464.04/42.79
6. Step 6: Final answer
   x = 57.59