Finding the Fourth Proportional to 2,328.83, 3,213.74 and 1,280.87

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.83 : 3,213.74 = 1,280.87 : x
2. Step 2: Convert to fraction form
   2,328.83/3,213.74 = 1,280.87/x
3. Step 3: Cross multiply
   2,328.83x = 3,213.74 × 1,280.87
4. Step 4: Simplify right side
   2,328.83x = 4,116,383.15
5. Step 5: Solve for x
   x = 4,116,383.15/2,328.83
6. Step 6: Final answer
   x = 1,767.58