Finding the Fourth Proportional to 107.67, 160.72 and 100.38

Step by Step Solution

1. Step 1: Write the proportion equation
   107.67 : 160.72 = 100.38 : x
2. Step 2: Convert to fraction form
   107.67/160.72 = 100.38/x
3. Step 3: Cross multiply
   107.67x = 160.72 × 100.38
4. Step 4: Simplify right side
   107.67x = 16,132.27
5. Step 5: Solve for x
   x = 16,132.27/107.67
6. Step 6: Final answer
   x = 149.84