Finding the Fourth Proportional to 20,105.32, 27,744.91 and 12,446.55

Step by Step Solution

1. Step 1: Write the proportion equation
   20,105.32 : 27,744.91 = 12,446.55 : x
2. Step 2: Convert to fraction form
   20,105.32/27,744.91 = 12,446.55/x
3. Step 3: Cross multiply
   20,105.32x = 27,744.91 × 12,446.55
4. Step 4: Simplify right side
   20,105.32x = 345,328,409.56
5. Step 5: Solve for x
   x = 345,328,409.56/20,105.32
6. Step 6: Final answer
   x = 17,175.97