Finding the Fourth Proportional to 2,319.31, 3,203.72 and 1,728.82

Step by Step Solution

1. Step 1: Write the proportion equation
   2,319.31 : 3,203.72 = 1,728.82 : x
2. Step 2: Convert to fraction form
   2,319.31/3,203.72 = 1,728.82/x
3. Step 3: Cross multiply
   2,319.31x = 3,203.72 × 1,728.82
4. Step 4: Simplify right side
   2,319.31x = 5,538,646.57
5. Step 5: Solve for x
   x = 5,538,646.57/2,319.31
6. Step 6: Final answer
   x = 2,388.06