Finding the Fourth Proportional to 2,144.25, 2,959.61 and 1,213.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.25 : 2,959.61 = 1,213.29 : x
2. Step 2: Convert to fraction form
   2,144.25/2,959.61 = 1,213.29/x
3. Step 3: Cross multiply
   2,144.25x = 2,959.61 × 1,213.29
4. Step 4: Simplify right side
   2,144.25x = 3,590,859.15
5. Step 5: Solve for x
   x = 3,590,859.15/2,144.25
6. Step 6: Final answer
   x = 1,674.65