Finding the Fourth Proportional to 2,205.40, 3,043.47 and 1,210.69

Step by Step Solution

1. Step 1: Write the proportion equation
   2,205.40 : 3,043.47 = 1,210.69 : x
2. Step 2: Convert to fraction form
   2,205.40/3,043.47 = 1,210.69/x
3. Step 3: Cross multiply
   2,205.40x = 3,043.47 × 1,210.69
4. Step 4: Simplify right side
   2,205.40x = 3,684,698.69
5. Step 5: Solve for x
   x = 3,684,698.69/2,205.40
6. Step 6: Final answer
   x = 1,670.76