Finding the Fourth Proportional to 109.32, 162.92 and 109.15

Step by Step Solution

1. Step 1: Write the proportion equation
   109.32 : 162.92 = 109.15 : x
2. Step 2: Convert to fraction form
   109.32/162.92 = 109.15/x
3. Step 3: Cross multiply
   109.32x = 162.92 × 109.15
4. Step 4: Simplify right side
   109.32x = 17,781.90
5. Step 5: Solve for x
   x = 17,781.90/109.32
6. Step 6: Final answer
   x = 162.67