Finding the Fourth Proportional to 1,635.48, 2,256.88 and 889.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,635.48 : 2,256.88 = 889.42 : x
2. Step 2: Convert to fraction form
   1,635.48/2,256.88 = 889.42/x
3. Step 3: Cross multiply
   1,635.48x = 2,256.88 × 889.42
4. Step 4: Simplify right side
   1,635.48x = 2,007,314.21
5. Step 5: Solve for x
   x = 2,007,314.21/1,635.48
6. Step 6: Final answer
   x = 1,227.35