Finding the Fourth Proportional to 2,814.23, 4,222.16 and 866.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,814.23 : 4,222.16 = 866.72 : x
2. Step 2: Convert to fraction form
   2,814.23/4,222.16 = 866.72/x
3. Step 3: Cross multiply
   2,814.23x = 4,222.16 × 866.72
4. Step 4: Simplify right side
   2,814.23x = 3,659,430.52
5. Step 5: Solve for x
   x = 3,659,430.52/2,814.23
6. Step 6: Final answer
   x = 1,300.33