Finding the Fourth Proportional to 2,099.01, 3,149.94 and 866.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,099.01 : 3,149.94 = 866.40 : x
2. Step 2: Convert to fraction form
   2,099.01/3,149.94 = 866.40/x
3. Step 3: Cross multiply
   2,099.01x = 3,149.94 × 866.40
4. Step 4: Simplify right side
   2,099.01x = 2,729,092.95
5. Step 5: Solve for x
   x = 2,729,092.95/2,099.01
6. Step 6: Final answer
   x = 1,300.18