Finding the Fourth Proportional to 2,721.39, 4,080.25 and 1,259.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,721.39 : 4,080.25 = 1,259.74 : x
2. Step 2: Convert to fraction form
   2,721.39/4,080.25 = 1,259.74/x
3. Step 3: Cross multiply
   2,721.39x = 4,080.25 × 1,259.74
4. Step 4: Simplify right side
   2,721.39x = 5,140,054.14
5. Step 5: Solve for x
   x = 5,140,054.14/2,721.39
6. Step 6: Final answer
   x = 1,888.76