Finding the Fourth Proportional to 139.34, 208.89 and 109.04

Step by Step Solution

1. Step 1: Write the proportion equation
   139.34 : 208.89 = 109.04 : x
2. Step 2: Convert to fraction form
   139.34/208.89 = 109.04/x
3. Step 3: Cross multiply
   139.34x = 208.89 × 109.04
4. Step 4: Simplify right side
   139.34x = 22,777.37
5. Step 5: Solve for x
   x = 22,777.37/139.34
6. Step 6: Final answer
   x = 163.47