Finding the Fourth Proportional to 20,105.87, 30,128.05 and 10,747.22

Step by Step Solution

1. Step 1: Write the proportion equation
   20,105.87 : 30,128.05 = 10,747.22 : x
2. Step 2: Convert to fraction form
   20,105.87/30,128.05 = 10,747.22/x
3. Step 3: Cross multiply
   20,105.87x = 30,128.05 × 10,747.22
4. Step 4: Simplify right side
   20,105.87x = 323,792,679.33
5. Step 5: Solve for x
   x = 323,792,679.33/20,105.87
6. Step 6: Final answer
   x = 16,104.38