Finding the Fourth Proportional to 20,105.40, 27,745.74 and 12,146.52

Step by Step Solution

1. Step 1: Write the proportion equation
   20,105.40 : 27,745.74 = 12,146.52 : x
2. Step 2: Convert to fraction form
   20,105.40/27,745.74 = 12,146.52/x
3. Step 3: Cross multiply
   20,105.40x = 27,745.74 × 12,146.52
4. Step 4: Simplify right side
   20,105.40x = 337,014,185.82
5. Step 5: Solve for x
   x = 337,014,185.82/20,105.40
6. Step 6: Final answer
   x = 16,762.37