Finding the Fourth Proportional to 1,443.39, 2,166.39 and 896.64

Step by Step Solution

1. Step 1: Write the proportion equation
   1,443.39 : 2,166.39 = 896.64 : x
2. Step 2: Convert to fraction form
   1,443.39/2,166.39 = 896.64/x
3. Step 3: Cross multiply
   1,443.39x = 2,166.39 × 896.64
4. Step 4: Simplify right side
   1,443.39x = 1,942,471.93
5. Step 5: Solve for x
   x = 1,942,471.93/1,443.39
6. Step 6: Final answer
   x = 1,345.77