Finding the Fourth Proportional to 2,207.43, 3,046.33 and 1,212.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,207.43 : 3,046.33 = 1,212.78 : x
2. Step 2: Convert to fraction form
   2,207.43/3,046.33 = 1,212.78/x
3. Step 3: Cross multiply
   2,207.43x = 3,046.33 × 1,212.78
4. Step 4: Simplify right side
   2,207.43x = 3,694,541.04
5. Step 5: Solve for x
   x = 3,694,541.04/2,207.43
6. Step 6: Final answer
   x = 1,673.68