Finding the Fourth Proportional to 139.82, 193.04 and 108.86

Step by Step Solution

1. Step 1: Write the proportion equation
   139.82 : 193.04 = 108.86 : x
2. Step 2: Convert to fraction form
   139.82/193.04 = 108.86/x
3. Step 3: Cross multiply
   139.82x = 193.04 × 108.86
4. Step 4: Simplify right side
   139.82x = 21,012.82
5. Step 5: Solve for x
   x = 21,012.82/139.82
6. Step 6: Final answer
   x = 150.29