Finding the Fourth Proportional to 139.73, 208.83 and 100.95

Step by Step Solution

1. Step 1: Write the proportion equation
   139.73 : 208.83 = 100.95 : x
2. Step 2: Convert to fraction form
   139.73/208.83 = 100.95/x
3. Step 3: Cross multiply
   139.73x = 208.83 × 100.95
4. Step 4: Simplify right side
   139.73x = 21,081.39
5. Step 5: Solve for x
   x = 21,081.39/139.73
6. Step 6: Final answer
   x = 150.88