Finding the Fourth Proportional to 1,643.94, 2,268.61 and 897.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.94 : 2,268.61 = 897.89 : x
2. Step 2: Convert to fraction form
   1,643.94/2,268.61 = 897.89/x
3. Step 3: Cross multiply
   1,643.94x = 2,268.61 × 897.89
4. Step 4: Simplify right side
   1,643.94x = 2,036,948.65
5. Step 5: Solve for x
   x = 2,036,948.65/1,643.94
6. Step 6: Final answer
   x = 1,239.07