Finding the Fourth Proportional to 2,144, 2,958.72 and 1,212.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144 : 2,958.72 = 1,212.72 : x
2. Step 2: Convert to fraction form
   2,144/2,958.72 = 1,212.72/x
3. Step 3: Cross multiply
   2,144x = 2,958.72 × 1,212.72
4. Step 4: Simplify right side
   2,144x = 3,588,098.92
5. Step 5: Solve for x
   x = 3,588,098.92/2,144
6. Step 6: Final answer
   x = 1,673.55