Finding the Fourth Proportional to 42.09, 63.15 and 35.69

Step by Step Solution

1. Step 1: Write the proportion equation
   42.09 : 63.15 = 35.69 : x
2. Step 2: Convert to fraction form
   42.09/63.15 = 35.69/x
3. Step 3: Cross multiply
   42.09x = 63.15 × 35.69
4. Step 4: Simplify right side
   42.09x = 2,253.83
5. Step 5: Solve for x
   x = 2,253.83/42.09
6. Step 6: Final answer
   x = 53.54