Finding the Fourth Proportional to 2,814.16, 4,220.42 and 866.52

Step by Step Solution

1. Step 1: Write the proportion equation
   2,814.16 : 4,220.42 = 866.52 : x
2. Step 2: Convert to fraction form
   2,814.16/4,220.42 = 866.52/x
3. Step 3: Cross multiply
   2,814.16x = 4,220.42 × 866.52
4. Step 4: Simplify right side
   2,814.16x = 3,657,078.34
5. Step 5: Solve for x
   x = 3,657,078.34/2,814.16
6. Step 6: Final answer
   x = 1,299.53