Finding the Fourth Proportional to 42.72, 58.94 and 35.48

Step by Step Solution

1. Step 1: Write the proportion equation
   42.72 : 58.94 = 35.48 : x
2. Step 2: Convert to fraction form
   42.72/58.94 = 35.48/x
3. Step 3: Cross multiply
   42.72x = 58.94 × 35.48
4. Step 4: Simplify right side
   42.72x = 2,091.19
5. Step 5: Solve for x
   x = 2,091.19/42.72
6. Step 6: Final answer
   x = 48.95