Finding the Fourth Proportional to 2,128.10, 3,186.38 and 1,099.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.10 : 3,186.38 = 1,099.94 : x
2. Step 2: Convert to fraction form
   2,128.10/3,186.38 = 1,099.94/x
3. Step 3: Cross multiply
   2,128.10x = 3,186.38 × 1,099.94
4. Step 4: Simplify right side
   2,128.10x = 3,504,826.82
5. Step 5: Solve for x
   x = 3,504,826.82/2,128.10
6. Step 6: Final answer
   x = 1,646.93