Finding the Fourth Proportional to 42.72, 58.96 and 29.58

Step by Step Solution

1. Step 1: Write the proportion equation
   42.72 : 58.96 = 29.58 : x
2. Step 2: Convert to fraction form
   42.72/58.96 = 29.58/x
3. Step 3: Cross multiply
   42.72x = 58.96 × 29.58
4. Step 4: Simplify right side
   42.72x = 1,744.04
5. Step 5: Solve for x
   x = 1,744.04/42.72
6. Step 6: Final answer
   x = 40.82