Finding the Fourth Proportional to 2,814.32, 4,221.54 and 866.54

Step by Step Solution

1. Step 1: Write the proportion equation
   2,814.32 : 4,221.54 = 866.54 : x
2. Step 2: Convert to fraction form
   2,814.32/4,221.54 = 866.54/x
3. Step 3: Cross multiply
   2,814.32x = 4,221.54 × 866.54
4. Step 4: Simplify right side
   2,814.32x = 3,658,143.83
5. Step 5: Solve for x
   x = 3,658,143.83/2,814.32
6. Step 6: Final answer
   x = 1,299.83