Finding the Fourth Proportional to 2,144.88, 3,218.16 and 846.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,144.88 : 3,218.16 = 846.72 : x
2. Step 2: Convert to fraction form
   2,144.88/3,218.16 = 846.72/x
3. Step 3: Cross multiply
   2,144.88x = 3,218.16 × 846.72
4. Step 4: Simplify right side
   2,144.88x = 2,724,880.44
5. Step 5: Solve for x
   x = 2,724,880.44/2,144.88
6. Step 6: Final answer
   x = 1,270.41