Finding the Fourth Proportional to 2,728.52, 4,093.50 and 780.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,728.52 : 4,093.50 = 780.88 : x
2. Step 2: Convert to fraction form
   2,728.52/4,093.50 = 780.88/x
3. Step 3: Cross multiply
   2,728.52x = 4,093.50 × 780.88
4. Step 4: Simplify right side
   2,728.52x = 3,196,532.28
5. Step 5: Solve for x
   x = 3,196,532.28/2,728.52
6. Step 6: Final answer
   x = 1,171.53