Finding the Fourth Proportional to 20,105.06, 27,743.73 and 12,142.58

Step by Step Solution

1. Step 1: Write the proportion equation
   20,105.06 : 27,743.73 = 12,142.58 : x
2. Step 2: Convert to fraction form
   20,105.06/27,743.73 = 12,142.58/x
3. Step 3: Cross multiply
   20,105.06x = 27,743.73 × 12,142.58
4. Step 4: Simplify right side
   20,105.06x = 336,880,461.02
5. Step 5: Solve for x
   x = 336,880,461.02/20,105.06
6. Step 6: Final answer
   x = 16,756.00