Finding the Fourth Proportional to 2,144.35, 3,216.72 and 845.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.35 : 3,216.72 = 845.50 : x
2. Step 2: Convert to fraction form
   2,144.35/3,216.72 = 845.50/x
3. Step 3: Cross multiply
   2,144.35x = 3,216.72 × 845.50
4. Step 4: Simplify right side
   2,144.35x = 2,719,736.76
5. Step 5: Solve for x
   x = 2,719,736.76/2,144.35
6. Step 6: Final answer
   x = 1,268.33