Finding the Fourth Proportional to 2,144.50, 2,959.59 and 1,213.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.50 : 2,959.59 = 1,213.18 : x
2. Step 2: Convert to fraction form
   2,144.50/2,959.59 = 1,213.18/x
3. Step 3: Cross multiply
   2,144.50x = 2,959.59 × 1,213.18
4. Step 4: Simplify right side
   2,144.50x = 3,590,515.40
5. Step 5: Solve for x
   x = 3,590,515.40/2,144.50
6. Step 6: Final answer
   x = 1,674.29