Finding the Fourth Proportional to 42.31, 58.35 and 35.02

Step by Step Solution

1. Step 1: Write the proportion equation
   42.31 : 58.35 = 35.02 : x
2. Step 2: Convert to fraction form
   42.31/58.35 = 35.02/x
3. Step 3: Cross multiply
   42.31x = 58.35 × 35.02
4. Step 4: Simplify right side
   42.31x = 2,043.42
5. Step 5: Solve for x
   x = 2,043.42/42.31
6. Step 6: Final answer
   x = 48.30