Finding the Fourth Proportional to 2,644.56, 3,967.56 and 889.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,644.56 : 3,967.56 = 889.68 : x
2. Step 2: Convert to fraction form
   2,644.56/3,967.56 = 889.68/x
3. Step 3: Cross multiply
   2,644.56x = 3,967.56 × 889.68
4. Step 4: Simplify right side
   2,644.56x = 3,529,858.78
5. Step 5: Solve for x
   x = 3,529,858.78/2,644.56
6. Step 6: Final answer
   x = 1,334.76