Finding the Fourth Proportional to 1,728.72, 2,588.28 and 1,344.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,728.72 : 2,588.28 = 1,344.72 : x
2. Step 2: Convert to fraction form
   1,728.72/2,588.28 = 1,344.72/x
3. Step 3: Cross multiply
   1,728.72x = 2,588.28 × 1,344.72
4. Step 4: Simplify right side
   1,728.72x = 3,480,511.88
5. Step 5: Solve for x
   x = 3,480,511.88/1,728.72
6. Step 6: Final answer
   x = 2,013.35