Finding the Fourth Proportional to 2,328.42, 3,491.55 and 866.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,328.42 : 3,491.55 = 866.64 : x
2. Step 2: Convert to fraction form
   2,328.42/3,491.55 = 866.64/x
3. Step 3: Cross multiply
   2,328.42x = 3,491.55 × 866.64
4. Step 4: Simplify right side
   2,328.42x = 3,025,916.89
5. Step 5: Solve for x
   x = 3,025,916.89/2,328.42
6. Step 6: Final answer
   x = 1,299.56