Finding the Fourth Proportional to 42.53, 58.59 and 35.15

Step by Step Solution

1. Step 1: Write the proportion equation
   42.53 : 58.59 = 35.15 : x
2. Step 2: Convert to fraction form
   42.53/58.59 = 35.15/x
3. Step 3: Cross multiply
   42.53x = 58.59 × 35.15
4. Step 4: Simplify right side
   42.53x = 2,059.15
5. Step 5: Solve for x
   x = 2,059.15/42.53
6. Step 6: Final answer
   x = 48.42