Finding the Fourth Proportional to 100.27, 138.38 and 72.73

Step by Step Solution

1. Step 1: Write the proportion equation
   100.27 : 138.38 = 72.73 : x
2. Step 2: Convert to fraction form
   100.27/138.38 = 72.73/x
3. Step 3: Cross multiply
   100.27x = 138.38 × 72.73
4. Step 4: Simplify right side
   100.27x = 10,063.69
5. Step 5: Solve for x
   x = 10,063.69/100.27
6. Step 6: Final answer
   x = 100.37