Finding the Fourth Proportional to 1,635.50, 2,256.96 and 889.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,635.50 : 2,256.96 = 889.45 : x
2. Step 2: Convert to fraction form
   1,635.50/2,256.96 = 889.45/x
3. Step 3: Cross multiply
   1,635.50x = 2,256.96 × 889.45
4. Step 4: Simplify right side
   1,635.50x = 2,007,447.43
5. Step 5: Solve for x
   x = 2,007,447.43/1,635.50
6. Step 6: Final answer
   x = 1,227.42