Finding the Fourth Proportional to 42.63, 58.77 and 42.23

Step by Step Solution

1. Step 1: Write the proportion equation
   42.63 : 58.77 = 42.23 : x
2. Step 2: Convert to fraction form
   42.63/58.77 = 42.23/x
3. Step 3: Cross multiply
   42.63x = 58.77 × 42.23
4. Step 4: Simplify right side
   42.63x = 2,481.56
5. Step 5: Solve for x
   x = 2,481.56/42.63
6. Step 6: Final answer
   x = 58.21