Finding the Fourth Proportional to 2,144.03, 3,215.71 and 828.39

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.03 : 3,215.71 = 828.39 : x
2. Step 2: Convert to fraction form
   2,144.03/3,215.71 = 828.39/x
3. Step 3: Cross multiply
   2,144.03x = 3,215.71 × 828.39
4. Step 4: Simplify right side
   2,144.03x = 2,663,862.01
5. Step 5: Solve for x
   x = 2,663,862.01/2,144.03
6. Step 6: Final answer
   x = 1,242.46