Finding the Fourth Proportional to 1,728.81, 2,581.49 and 1,359.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.81 : 2,581.49 = 1,359.45 : x
2. Step 2: Convert to fraction form
   1,728.81/2,581.49 = 1,359.45/x
3. Step 3: Cross multiply
   1,728.81x = 2,581.49 × 1,359.45
4. Step 4: Simplify right side
   1,728.81x = 3,509,409.98
5. Step 5: Solve for x
   x = 3,509,409.98/1,728.81
6. Step 6: Final answer
   x = 2,029.96