Finding the Fourth Proportional to 2,644.16, 3,966.69 and 889.33

Step by Step Solution

1. Step 1: Write the proportion equation
   2,644.16 : 3,966.69 = 889.33 : x
2. Step 2: Convert to fraction form
   2,644.16/3,966.69 = 889.33/x
3. Step 3: Cross multiply
   2,644.16x = 3,966.69 × 889.33
4. Step 4: Simplify right side
   2,644.16x = 3,527,696.42
5. Step 5: Solve for x
   x = 3,527,696.42/2,644.16
6. Step 6: Final answer
   x = 1,334.15