Finding the Fourth Proportional to 100.67, 138.83 and 96.50

Step by Step Solution

1. Step 1: Write the proportion equation
   100.67 : 138.83 = 96.50 : x
2. Step 2: Convert to fraction form
   100.67/138.83 = 96.50/x
3. Step 3: Cross multiply
   100.67x = 138.83 × 96.50
4. Step 4: Simplify right side
   100.67x = 13,395.92
5. Step 5: Solve for x
   x = 13,395.92/100.67
6. Step 6: Final answer
   x = 133.07