Finding the Fourth Proportional to 42.29, 58.38 and 34.55

Step by Step Solution

1. Step 1: Write the proportion equation
   42.29 : 58.38 = 34.55 : x
2. Step 2: Convert to fraction form
   42.29/58.38 = 34.55/x
3. Step 3: Cross multiply
   42.29x = 58.38 × 34.55
4. Step 4: Simplify right side
   42.29x = 2,017.03
5. Step 5: Solve for x
   x = 2,017.03/42.29
6. Step 6: Final answer
   x = 47.70