Finding the Fourth Proportional to 2,097.91, 3,144.81 and 866.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,097.91 : 3,144.81 = 866.36 : x
2. Step 2: Convert to fraction form
   2,097.91/3,144.81 = 866.36/x
3. Step 3: Cross multiply
   2,097.91x = 3,144.81 × 866.36
4. Step 4: Simplify right side
   2,097.91x = 2,724,531.90
5. Step 5: Solve for x
   x = 2,724,531.90/2,097.91
6. Step 6: Final answer
   x = 1,298.69