Finding the Fourth Proportional to 72.71, 109.33 and 50.03

Step by Step Solution

1. Step 1: Write the proportion equation
   72.71 : 109.33 = 50.03 : x
2. Step 2: Convert to fraction form
   72.71/109.33 = 50.03/x
3. Step 3: Cross multiply
   72.71x = 109.33 × 50.03
4. Step 4: Simplify right side
   72.71x = 5,469.11
5. Step 5: Solve for x
   x = 5,469.11/72.71
6. Step 6: Final answer
   x = 75.22