Finding the Fourth Proportional to 2,873.89, 3,963.69 and 1,864.49

Step by Step Solution

1. Step 1: Write the proportion equation
   2,873.89 : 3,963.69 = 1,864.49 : x
2. Step 2: Convert to fraction form
   2,873.89/3,963.69 = 1,864.49/x
3. Step 3: Cross multiply
   2,873.89x = 3,963.69 × 1,864.49
4. Step 4: Simplify right side
   2,873.89x = 7,390,271.37
5. Step 5: Solve for x
   x = 7,390,271.37/2,873.89
6. Step 6: Final answer
   x = 2,571.52