Finding the Fourth Proportional to 20,061.20, 27,683.16 and 12,105.20

Step by Step Solution

1. Step 1: Write the proportion equation
   20,061.20 : 27,683.16 = 12,105.20 : x
2. Step 2: Convert to fraction form
   20,061.20/27,683.16 = 12,105.20/x
3. Step 3: Cross multiply
   20,061.20x = 27,683.16 × 12,105.20
4. Step 4: Simplify right side
   20,061.20x = 335,110,188.43
5. Step 5: Solve for x
   x = 335,110,188.43/20,061.20
6. Step 6: Final answer
   x = 16,704.39