Finding the Fourth Proportional to 103.82, 155.73 and 67.31

Step by Step Solution

1. Step 1: Write the proportion equation
   103.82 : 155.73 = 67.31 : x
2. Step 2: Convert to fraction form
   103.82/155.73 = 67.31/x
3. Step 3: Cross multiply
   103.82x = 155.73 × 67.31
4. Step 4: Simplify right side
   103.82x = 10,482.19
5. Step 5: Solve for x
   x = 10,482.19/103.82
6. Step 6: Final answer
   x = 100.97