Finding the Fourth Proportional to 72,717.69, 109,064.39 and 20,132.49

Step by Step Solution

1. Step 1: Write the proportion equation
   72,717.69 : 109,064.39 = 20,132.49 : x
2. Step 2: Convert to fraction form
   72,717.69/109,064.39 = 20,132.49/x
3. Step 3: Cross multiply
   72,717.69x = 109,064.39 × 20,132.49
4. Step 4: Simplify right side
   72,717.69x = 2,195,737,640.37
5. Step 5: Solve for x
   x = 2,195,737,640.37/72,717.69
6. Step 6: Final answer
   x = 30,195.37