Finding the Fourth Proportional to 1,643.83, 2,268.47 and 897.78

Step by Step Solution

1. Step 1: Write the proportion equation
   1,643.83 : 2,268.47 = 897.78 : x
2. Step 2: Convert to fraction form
   1,643.83/2,268.47 = 897.78/x
3. Step 3: Cross multiply
   1,643.83x = 2,268.47 × 897.78
4. Step 4: Simplify right side
   1,643.83x = 2,036,582.51
5. Step 5: Solve for x
   x = 2,036,582.51/1,643.83
6. Step 6: Final answer
   x = 1,238.93