Finding the Fourth Proportional to 2,155.75, 3,235.25 and 1,728.07

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.75 : 3,235.25 = 1,728.07 : x
2. Step 2: Convert to fraction form
   2,155.75/3,235.25 = 1,728.07/x
3. Step 3: Cross multiply
   2,155.75x = 3,235.25 × 1,728.07
4. Step 4: Simplify right side
   2,155.75x = 5,590,713.65
5. Step 5: Solve for x
   x = 5,590,713.65/2,155.75
6. Step 6: Final answer
   x = 2,593.40