Finding the Fourth Proportional to 2,768.28, 4,152.34 and 820.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,768.28 : 4,152.34 = 820.52 : x
2. Step 2: Convert to fraction form
   2,768.28/4,152.34 = 820.52/x
3. Step 3: Cross multiply
   2,768.28x = 4,152.34 × 820.52
4. Step 4: Simplify right side
   2,768.28x = 3,407,078.02
5. Step 5: Solve for x
   x = 3,407,078.02/2,768.28
6. Step 6: Final answer
   x = 1,230.76