Finding the Fourth Proportional to 2,328.82, 3,213.76 and 1,280.88

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.82 : 3,213.76 = 1,280.88 : x
2. Step 2: Convert to fraction form
   2,328.82/3,213.76 = 1,280.88/x
3. Step 3: Cross multiply
   2,328.82x = 3,213.76 × 1,280.88
4. Step 4: Simplify right side
   2,328.82x = 4,116,440.91
5. Step 5: Solve for x
   x = 4,116,440.91/2,328.82
6. Step 6: Final answer
   x = 1,767.61