Finding the Fourth Proportional to 100.72, 139.57 and 96.94

Step by Step Solution

1. Step 1: Write the proportion equation
   100.72 : 139.57 = 96.94 : x
2. Step 2: Convert to fraction form
   100.72/139.57 = 96.94/x
3. Step 3: Cross multiply
   100.72x = 139.57 × 96.94
4. Step 4: Simplify right side
   100.72x = 13,529.92
5. Step 5: Solve for x
   x = 13,529.92/100.72
6. Step 6: Final answer
   x = 134.33