Finding the Fourth Proportional to 2,315.97, 3,198.83 and 1,645.29

Step by Step Solution

1. Step 1: Write the proportion equation
   2,315.97 : 3,198.83 = 1,645.29 : x
2. Step 2: Convert to fraction form
   2,315.97/3,198.83 = 1,645.29/x
3. Step 3: Cross multiply
   2,315.97x = 3,198.83 × 1,645.29
4. Step 4: Simplify right side
   2,315.97x = 5,262,994.78
5. Step 5: Solve for x
   x = 5,262,994.78/2,315.97
6. Step 6: Final answer
   x = 2,272.48