Finding the Fourth Proportional to 2,128.20, 2,936.76 and 1,183.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,128.20 : 2,936.76 = 1,183.98 : x
2. Step 2: Convert to fraction form
   2,128.20/2,936.76 = 1,183.98/x
3. Step 3: Cross multiply
   2,128.20x = 2,936.76 × 1,183.98
4. Step 4: Simplify right side
   2,128.20x = 3,477,065.10
5. Step 5: Solve for x
   x = 3,477,065.10/2,128.20
6. Step 6: Final answer
   x = 1,633.81