Finding the Fourth Proportional to 20,104.72, 27,747.83 and 11,155.10

Step by Step Solution

1. Step 1: Write the proportion equation
   20,104.72 : 27,747.83 = 11,155.10 : x
2. Step 2: Convert to fraction form
   20,104.72/27,747.83 = 11,155.10/x
3. Step 3: Cross multiply
   20,104.72x = 27,747.83 × 11,155.10
4. Step 4: Simplify right side
   20,104.72x = 309,529,941.70
5. Step 5: Solve for x
   x = 309,529,941.70/20,104.72
6. Step 6: Final answer
   x = 15,395.89