Finding the Fourth Proportional to 1,644.82, 2,269.83 and 898.77

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.82 : 2,269.83 = 898.77 : x
2. Step 2: Convert to fraction form
   1,644.82/2,269.83 = 898.77/x
3. Step 3: Cross multiply
   1,644.82x = 2,269.83 × 898.77
4. Step 4: Simplify right side
   1,644.82x = 2,040,049.17
5. Step 5: Solve for x
   x = 2,040,049.17/1,644.82
6. Step 6: Final answer
   x = 1,240.28