Finding the Fourth Proportional to 1,635.55, 2,257.05 and 889.49

Step by Step Solution

1. Step 1: Write the proportion equation
   1,635.55 : 2,257.05 = 889.49 : x
2. Step 2: Convert to fraction form
   1,635.55/2,257.05 = 889.49/x
3. Step 3: Cross multiply
   1,635.55x = 2,257.05 × 889.49
4. Step 4: Simplify right side
   1,635.55x = 2,007,620.07
5. Step 5: Solve for x
   x = 2,007,620.07/1,635.55
6. Step 6: Final answer
   x = 1,227.49