Finding the Fourth Proportional to 2,144.55, 2,959.29 and 1,213.05

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.55 : 2,959.29 = 1,213.05 : x
2. Step 2: Convert to fraction form
   2,144.55/2,959.29 = 1,213.05/x
3. Step 3: Cross multiply
   2,144.55x = 2,959.29 × 1,213.05
4. Step 4: Simplify right side
   2,144.55x = 3,589,766.73
5. Step 5: Solve for x
   x = 3,589,766.73/2,144.55
6. Step 6: Final answer
   x = 1,673.90