Finding the Fourth Proportional to 2,144.34, 2,959.29 and 1,212.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.34 : 2,959.29 = 1,212.84 : x
2. Step 2: Convert to fraction form
   2,144.34/2,959.29 = 1,212.84/x
3. Step 3: Cross multiply
   2,144.34x = 2,959.29 × 1,212.84
4. Step 4: Simplify right side
   2,144.34x = 3,589,145.28
5. Step 5: Solve for x
   x = 3,589,145.28/2,144.34
6. Step 6: Final answer
   x = 1,673.78