Finding the Fourth Proportional to 12,288.78, 18,433.18 and 3,054.78

Step by Step Solution

1. Step 1: Write the proportion equation
   12,288.78 : 18,433.18 = 3,054.78 : x
2. Step 2: Convert to fraction form
   12,288.78/18,433.18 = 3,054.78/x
3. Step 3: Cross multiply
   12,288.78x = 18,433.18 × 3,054.78
4. Step 4: Simplify right side
   12,288.78x = 56,309,202.16
5. Step 5: Solve for x
   x = 56,309,202.16/12,288.78
6. Step 6: Final answer
   x = 4,582.17