Finding the Fourth Proportional to 2,205.30, 3,304.74 and 2,138.74

Step by Step Solution

1. Step 1: Write the proportion equation
   2,205.30 : 3,304.74 = 2,138.74 : x
2. Step 2: Convert to fraction form
   2,205.30/3,304.74 = 2,138.74/x
3. Step 3: Cross multiply
   2,205.30x = 3,304.74 × 2,138.74
4. Step 4: Simplify right side
   2,205.30x = 7,067,979.63
5. Step 5: Solve for x
   x = 7,067,979.63/2,205.30
6. Step 6: Final answer
   x = 3,205.00