Finding the Fourth Proportional to 2,768.78, 4,154.50 and 1,728.50

Step by Step Solution

1. Step 1: Write the proportion equation
   2,768.78 : 4,154.50 = 1,728.50 : x
2. Step 2: Convert to fraction form
   2,768.78/4,154.50 = 1,728.50/x
3. Step 3: Cross multiply
   2,768.78x = 4,154.50 × 1,728.50
4. Step 4: Simplify right side
   2,768.78x = 7,181,053.25
5. Step 5: Solve for x
   x = 7,181,053.25/2,768.78
6. Step 6: Final answer
   x = 2,593.58