Finding the Fourth Proportional to 2,098.56, 3,146.67 and 866.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,098.56 : 3,146.67 = 866.81 : x
2. Step 2: Convert to fraction form
   2,098.56/3,146.67 = 866.81/x
3. Step 3: Cross multiply
   2,098.56x = 3,146.67 × 866.81
4. Step 4: Simplify right side
   2,098.56x = 2,727,552.54
5. Step 5: Solve for x
   x = 2,727,552.54/2,098.56
6. Step 6: Final answer
   x = 1,299.73