Finding the Fourth Proportional to 139.94, 209.58 and 112.82

Step by Step Solution

1. Step 1: Write the proportion equation
   139.94 : 209.58 = 112.82 : x
2. Step 2: Convert to fraction form
   139.94/209.58 = 112.82/x
3. Step 3: Cross multiply
   139.94x = 209.58 × 112.82
4. Step 4: Simplify right side
   139.94x = 23,644.82
5. Step 5: Solve for x
   x = 23,644.82/139.94
6. Step 6: Final answer
   x = 168.96