Finding the Fourth Proportional to 139.03, 191.69 and 109.46

Step by Step Solution

1. Step 1: Write the proportion equation
   139.03 : 191.69 = 109.46 : x
2. Step 2: Convert to fraction form
   139.03/191.69 = 109.46/x
3. Step 3: Cross multiply
   139.03x = 191.69 × 109.46
4. Step 4: Simplify right side
   139.03x = 20,982.39
5. Step 5: Solve for x
   x = 20,982.39/139.03
6. Step 6: Final answer
   x = 150.92