Finding the Fourth Proportional to 2,155.52, 3,233.04 and 768.56

Step by Step Solution

1. Step 1: Write the proportion equation
   2,155.52 : 3,233.04 = 768.56 : x
2. Step 2: Convert to fraction form
   2,155.52/3,233.04 = 768.56/x
3. Step 3: Cross multiply
   2,155.52x = 3,233.04 × 768.56
4. Step 4: Simplify right side
   2,155.52x = 2,484,785.22
5. Step 5: Solve for x
   x = 2,484,785.22/2,155.52
6. Step 6: Final answer
   x = 1,152.75