Finding the Fourth Proportional to 2,144.20, 3,216.78 and 846.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.20 : 3,216.78 = 846.04 : x
2. Step 2: Convert to fraction form
   2,144.20/3,216.78 = 846.04/x
3. Step 3: Cross multiply
   2,144.20x = 3,216.78 × 846.04
4. Step 4: Simplify right side
   2,144.20x = 2,721,524.55
5. Step 5: Solve for x
   x = 2,721,524.55/2,144.20
6. Step 6: Final answer
   x = 1,269.25