Finding the Fourth Proportional to 2,205.37, 3,292.28 and 2,128.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,205.37 : 3,292.28 = 2,128.42 : x
2. Step 2: Convert to fraction form
   2,205.37/3,292.28 = 2,128.42/x
3. Step 3: Cross multiply
   2,205.37x = 3,292.28 × 2,128.42
4. Step 4: Simplify right side
   2,205.37x = 7,007,354.60
5. Step 5: Solve for x
   x = 7,007,354.60/2,205.37
6. Step 6: Final answer
   x = 3,177.41