Finding the Fourth Proportional to 144.51, 199.31 and 100.82

Step by Step Solution

1. Step 1: Write the proportion equation
   144.51 : 199.31 = 100.82 : x
2. Step 2: Convert to fraction form
   144.51/199.31 = 100.82/x
3. Step 3: Cross multiply
   144.51x = 199.31 × 100.82
4. Step 4: Simplify right side
   144.51x = 20,092.93
5. Step 5: Solve for x
   x = 20,092.93/144.51
6. Step 6: Final answer
   x = 139.04