Finding the Fourth Proportional to 107.89, 162.70 and 106.72

Step by Step Solution

1. Step 1: Write the proportion equation
   107.89 : 162.70 = 106.72 : x
2. Step 2: Convert to fraction form
   107.89/162.70 = 106.72/x
3. Step 3: Cross multiply
   107.89x = 162.70 × 106.72
4. Step 4: Simplify right side
   107.89x = 17,363.34
5. Step 5: Solve for x
   x = 17,363.34/107.89
6. Step 6: Final answer
   x = 160.94