Finding the Fourth Proportional to 20,240.01, 27,935.89 and 12,280.55

Step by Step Solution

1. Step 1: Write the proportion equation
   20,240.01 : 27,935.89 = 12,280.55 : x
2. Step 2: Convert to fraction form
   20,240.01/27,935.89 = 12,280.55/x
3. Step 3: Cross multiply
   20,240.01x = 27,935.89 × 12,280.55
4. Step 4: Simplify right side
   20,240.01x = 343,067,923.56
5. Step 5: Solve for x
   x = 343,067,923.56/20,240.01
6. Step 6: Final answer
   x = 16,949.99