Finding the Fourth Proportional to 1,635.31, 2,256.69 and 889.25

Step by Step Solution

1. Step 1: Write the proportion equation
   1,635.31 : 2,256.69 = 889.25 : x
2. Step 2: Convert to fraction form
   1,635.31/2,256.69 = 889.25/x
3. Step 3: Cross multiply
   1,635.31x = 2,256.69 × 889.25
4. Step 4: Simplify right side
   1,635.31x = 2,006,761.58
5. Step 5: Solve for x
   x = 2,006,761.58/1,635.31
6. Step 6: Final answer
   x = 1,227.15