Finding the Fourth Proportional to 2,207.91, 3,046.91 and 1,213.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,207.91 : 3,046.91 = 1,213.25 : x
2. Step 2: Convert to fraction form
   2,207.91/3,046.91 = 1,213.25/x
3. Step 3: Cross multiply
   2,207.91x = 3,046.91 × 1,213.25
4. Step 4: Simplify right side
   2,207.91x = 3,696,665.78
5. Step 5: Solve for x
   x = 3,696,665.78/2,207.91
6. Step 6: Final answer
   x = 1,674.28