Finding the Fourth Proportional to 2,144.10, 3,215.61 and 845.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.10 : 3,215.61 = 845.58 : x
2. Step 2: Convert to fraction form
   2,144.10/3,215.61 = 845.58/x
3. Step 3: Cross multiply
   2,144.10x = 3,215.61 × 845.58
4. Step 4: Simplify right side
   2,144.10x = 2,719,055.50
5. Step 5: Solve for x
   x = 2,719,055.50/2,144.10
6. Step 6: Final answer
   x = 1,268.16