Finding the Fourth Proportional to 2,164.56, 3,247.92 and 866.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,164.56 : 3,247.92 = 866.96 : x
2. Step 2: Convert to fraction form
   2,164.56/3,247.92 = 866.96/x
3. Step 3: Cross multiply
   2,164.56x = 3,247.92 × 866.96
4. Step 4: Simplify right side
   2,164.56x = 2,815,816.72
5. Step 5: Solve for x
   x = 2,815,816.72/2,164.56
6. Step 6: Final answer
   x = 1,300.87