Finding the Fourth Proportional to 139.34, 208.38 and 118.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139.34 : 208.38 = 118.82 : x
2. Step 2: Convert to fraction form
   139.34/208.38 = 118.82/x
3. Step 3: Cross multiply
   139.34x = 208.38 × 118.82
4. Step 4: Simplify right side
   139.34x = 24,759.71
5. Step 5: Solve for x
   x = 24,759.71/139.34
6. Step 6: Final answer
   x = 177.69