Finding the Fourth Proportional to 2,919.12, 4,028.46 and 1,800.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,919.12 : 4,028.46 = 1,800.72 : x
2. Step 2: Convert to fraction form
   2,919.12/4,028.46 = 1,800.72/x
3. Step 3: Cross multiply
   2,919.12x = 4,028.46 × 1,800.72
4. Step 4: Simplify right side
   2,919.12x = 7,254,128.49
5. Step 5: Solve for x
   x = 7,254,128.49/2,919.12
6. Step 6: Final answer
   x = 2,485.04