Finding the Fourth Proportional to 2,099.67, 3,147.20 and 866.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.67 : 3,147.20 = 866.41 : x
2. Step 2: Convert to fraction form
   2,099.67/3,147.20 = 866.41/x
3. Step 3: Cross multiply
   2,099.67x = 3,147.20 × 866.41
4. Step 4: Simplify right side
   2,099.67x = 2,726,768.40
5. Step 5: Solve for x
   x = 2,726,768.40/2,099.67
6. Step 6: Final answer
   x = 1,298.67