Finding the Fourth Proportional to 2,544, 3,510.72 and 1,440

Step by Step Solution

1. Step 1: Write the proportion equation
   2,544 : 3,510.72 = 1,440 : x
2. Step 2: Convert to fraction form
   2,544/3,510.72 = 1,440/x
3. Step 3: Cross multiply
   2,544x = 3,510.72 × 1,440
4. Step 4: Simplify right side
   2,544x = 5,055,436.80
5. Step 5: Solve for x
   x = 5,055,436.80/2,544
6. Step 6: Final answer
   x = 1,987.20