Finding the Fourth Proportional to 2,144.88, 3,212.76 and 1,219.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.88 : 3,212.76 = 1,219.96 : x
2. Step 2: Convert to fraction form
   2,144.88/3,212.76 = 1,219.96/x
3. Step 3: Cross multiply
   2,144.88x = 3,212.76 × 1,219.96
4. Step 4: Simplify right side
   2,144.88x = 3,919,447.28
5. Step 5: Solve for x
   x = 3,919,447.28/2,144.88
6. Step 6: Final answer
   x = 1,827.35