Finding the Fourth Proportional to 111.65, 168.32 and 103.82

Step by Step Solution

1. Step 1: Write the proportion equation
   111.65 : 168.32 = 103.82 : x
2. Step 2: Convert to fraction form
   111.65/168.32 = 103.82/x
3. Step 3: Cross multiply
   111.65x = 168.32 × 103.82
4. Step 4: Simplify right side
   111.65x = 17,474.56
5. Step 5: Solve for x
   x = 17,474.56/111.65
6. Step 6: Final answer
   x = 156.52