Finding the Fourth Proportional to 42.40, 58.92 and 42.24

Step by Step Solution

1. Step 1: Write the proportion equation
   42.40 : 58.92 = 42.24 : x
2. Step 2: Convert to fraction form
   42.40/58.92 = 42.24/x
3. Step 3: Cross multiply
   42.40x = 58.92 × 42.24
4. Step 4: Simplify right side
   42.40x = 2,488.78
5. Step 5: Solve for x
   x = 2,488.78/42.40
6. Step 6: Final answer
   x = 58.70