Finding the Fourth Proportional to 12,288.72, 18,433.20 and 3,054.72

Step by Step Solution

1. Step 1: Write the proportion equation
   12,288.72 : 18,433.20 = 3,054.72 : x
2. Step 2: Convert to fraction form
   12,288.72/18,433.20 = 3,054.72/x
3. Step 3: Cross multiply
   12,288.72x = 18,433.20 × 3,054.72
4. Step 4: Simplify right side
   12,288.72x = 56,308,264.70
5. Step 5: Solve for x
   x = 56,308,264.70/12,288.72
6. Step 6: Final answer
   x = 4,582.11