Finding the Fourth Proportional to 2,613.78, 3,604.86 and 1,728.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,613.78 : 3,604.86 = 1,728.72 : x
2. Step 2: Convert to fraction form
   2,613.78/3,604.86 = 1,728.72/x
3. Step 3: Cross multiply
   2,613.78x = 3,604.86 × 1,728.72
4. Step 4: Simplify right side
   2,613.78x = 6,231,793.58
5. Step 5: Solve for x
   x = 6,231,793.58/2,613.78
6. Step 6: Final answer
   x = 2,384.21