Finding the Fourth Proportional to 3,144.59, 4,339.20 and 1,818.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,144.59 : 4,339.20 = 1,818.72 : x
2. Step 2: Convert to fraction form
   3,144.59/4,339.20 = 1,818.72/x
3. Step 3: Cross multiply
   3,144.59x = 4,339.20 × 1,818.72
4. Step 4: Simplify right side
   3,144.59x = 7,891,796.64
5. Step 5: Solve for x
   x = 7,891,796.64/3,144.59
6. Step 6: Final answer
   x = 2,509.64