Finding the Fourth Proportional to 101.33, 139.69 and 71.73

Step by Step Solution

1. Step 1: Write the proportion equation
   101.33 : 139.69 = 71.73 : x
2. Step 2: Convert to fraction form
   101.33/139.69 = 71.73/x
3. Step 3: Cross multiply
   101.33x = 139.69 × 71.73
4. Step 4: Simplify right side
   101.33x = 10,019.78
5. Step 5: Solve for x
   x = 10,019.78/101.33
6. Step 6: Final answer
   x = 98.88