Finding the Fourth Proportional to 2,253.60, 3,112.92 and 1,728.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,253.60 : 3,112.92 = 1,728.72 : x
2. Step 2: Convert to fraction form
   2,253.60/3,112.92 = 1,728.72/x
3. Step 3: Cross multiply
   2,253.60x = 3,112.92 × 1,728.72
4. Step 4: Simplify right side
   2,253.60x = 5,381,367.06
5. Step 5: Solve for x
   x = 5,381,367.06/2,253.60
6. Step 6: Final answer
   x = 2,387.90