Finding the Fourth Proportional to 1,636.03, 2,257.72 and 889.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.03 : 2,257.72 = 889.98 : x
2. Step 2: Convert to fraction form
   1,636.03/2,257.72 = 889.98/x
3. Step 3: Cross multiply
   1,636.03x = 2,257.72 × 889.98
4. Step 4: Simplify right side
   1,636.03x = 2,009,325.65
5. Step 5: Solve for x
   x = 2,009,325.65/1,636.03
6. Step 6: Final answer
   x = 1,228.17