Finding the Fourth Proportional to 2,843.04, 3,920.88 and 2,178.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,843.04 : 3,920.88 = 2,178.72 : x
2. Step 2: Convert to fraction form
   2,843.04/3,920.88 = 2,178.72/x
3. Step 3: Cross multiply
   2,843.04x = 3,920.88 × 2,178.72
4. Step 4: Simplify right side
   2,843.04x = 8,542,499.67
5. Step 5: Solve for x
   x = 8,542,499.67/2,843.04
6. Step 6: Final answer
   x = 3,004.71