Finding the Fourth Proportional to 109.04, 162.58 and 105.09

Step by Step Solution

1. Step 1: Write the proportion equation
   109.04 : 162.58 = 105.09 : x
2. Step 2: Convert to fraction form
   109.04/162.58 = 105.09/x
3. Step 3: Cross multiply
   109.04x = 162.58 × 105.09
4. Step 4: Simplify right side
   109.04x = 17,084.72
5. Step 5: Solve for x
   x = 17,084.72/109.04
6. Step 6: Final answer
   x = 156.69