Finding the Fourth Proportional to 2,688.50, 4,033.71 and 1,321.46

Step by Step Solution

1. Step 1: Write the proportion equation
   2,688.50 : 4,033.71 = 1,321.46 : x
2. Step 2: Convert to fraction form
   2,688.50/4,033.71 = 1,321.46/x
3. Step 3: Cross multiply
   2,688.50x = 4,033.71 × 1,321.46
4. Step 4: Simplify right side
   2,688.50x = 5,330,386.42
5. Step 5: Solve for x
   x = 5,330,386.42/2,688.50
6. Step 6: Final answer
   x = 1,982.66