Finding the Fourth Proportional to 42.88, 59.21 and 35.17

Step by Step Solution

1. Step 1: Write the proportion equation
   42.88 : 59.21 = 35.17 : x
2. Step 2: Convert to fraction form
   42.88/59.21 = 35.17/x
3. Step 3: Cross multiply
   42.88x = 59.21 × 35.17
4. Step 4: Simplify right side
   42.88x = 2,082.42
5. Step 5: Solve for x
   x = 2,082.42/42.88
6. Step 6: Final answer
   x = 48.56