Finding the Fourth Proportional to 100.96, 139.15 and 73.28

Step by Step Solution

1. Step 1: Write the proportion equation
   100.96 : 139.15 = 73.28 : x
2. Step 2: Convert to fraction form
   100.96/139.15 = 73.28/x
3. Step 3: Cross multiply
   100.96x = 139.15 × 73.28
4. Step 4: Simplify right side
   100.96x = 10,196.91
5. Step 5: Solve for x
   x = 10,196.91/100.96
6. Step 6: Final answer
   x = 101.00