Finding the Fourth Proportional to 12,309.30, 18,483.42 and 9,723.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,309.30 : 18,483.42 = 9,723.78 : x
2. Step 2: Convert to fraction form
   12,309.30/18,483.42 = 9,723.78/x
3. Step 3: Cross multiply
   12,309.30x = 18,483.42 × 9,723.78
4. Step 4: Simplify right side
   12,309.30x = 179,728,709.73
5. Step 5: Solve for x
   x = 179,728,709.73/12,309.30
6. Step 6: Final answer
   x = 14,601.05