Finding the Fourth Proportional to 42.18, 63.09 and 35.82

Step by Step Solution

1. Step 1: Write the proportion equation
   42.18 : 63.09 = 35.82 : x
2. Step 2: Convert to fraction form
   42.18/63.09 = 35.82/x
3. Step 3: Cross multiply
   42.18x = 63.09 × 35.82
4. Step 4: Simplify right side
   42.18x = 2,259.88
5. Step 5: Solve for x
   x = 2,259.88/42.18
6. Step 6: Final answer
   x = 53.58