Finding the Fourth Proportional to 2,814.00, 4,221.56 and 866.13

Step by Step Solution

1. Step 1: Write the proportion equation
   2,814.00 : 4,221.56 = 866.13 : x
2. Step 2: Convert to fraction form
   2,814.00/4,221.56 = 866.13/x
3. Step 3: Cross multiply
   2,814.00x = 4,221.56 × 866.13
4. Step 4: Simplify right side
   2,814.00x = 3,656,394.32
5. Step 5: Solve for x
   x = 3,656,394.32/2,814.00
6. Step 6: Final answer
   x = 1,299.36