Finding the Fourth Proportional to 100.82, 139.94 and 96.86

Step by Step Solution

1. Step 1: Write the proportion equation
   100.82 : 139.94 = 96.86 : x
2. Step 2: Convert to fraction form
   100.82/139.94 = 96.86/x
3. Step 3: Cross multiply
   100.82x = 139.94 × 96.86
4. Step 4: Simplify right side
   100.82x = 13,554.59
5. Step 5: Solve for x
   x = 13,554.59/100.82
6. Step 6: Final answer
   x = 134.44