Finding the Fourth Proportional to 1,721.88, 2,581.88 and 1,019.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,721.88 : 2,581.88 = 1,019.39 : x
2. Step 2: Convert to fraction form
   1,721.88/2,581.88 = 1,019.39/x
3. Step 3: Cross multiply
   1,721.88x = 2,581.88 × 1,019.39
4. Step 4: Simplify right side
   1,721.88x = 2,631,924.65
5. Step 5: Solve for x
   x = 2,631,924.65/1,721.88
6. Step 6: Final answer
   x = 1,528.52