Finding the Fourth Proportional to 42.40, 58.01 and 42.22

Step by Step Solution

1. Step 1: Write the proportion equation
   42.40 : 58.01 = 42.22 : x
2. Step 2: Convert to fraction form
   42.40/58.01 = 42.22/x
3. Step 3: Cross multiply
   42.40x = 58.01 × 42.22
4. Step 4: Simplify right side
   42.40x = 2,449.18
5. Step 5: Solve for x
   x = 2,449.18/42.40
6. Step 6: Final answer
   x = 57.76