Finding the Fourth Proportional to 2,328.69, 3,213.59 and 1,280.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.69 : 3,213.59 = 1,280.75 : x
2. Step 2: Convert to fraction form
   2,328.69/3,213.59 = 1,280.75/x
3. Step 3: Cross multiply
   2,328.69x = 3,213.59 × 1,280.75
4. Step 4: Simplify right side
   2,328.69x = 4,115,805.39
5. Step 5: Solve for x
   x = 4,115,805.39/2,328.69
6. Step 6: Final answer
   x = 1,767.43