Finding the Fourth Proportional to 1,728.50, 2,594.31 and 1,171.86

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.50 : 2,594.31 = 1,171.86 : x
2. Step 2: Convert to fraction form
   1,728.50/2,594.31 = 1,171.86/x
3. Step 3: Cross multiply
   1,728.50x = 2,594.31 × 1,171.86
4. Step 4: Simplify right side
   1,728.50x = 3,040,168.12
5. Step 5: Solve for x
   x = 3,040,168.12/1,728.50
6. Step 6: Final answer
   x = 1,758.85