Finding the Fourth Proportional to 1,644.62, 2,269.59 and 898.59

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.62 : 2,269.59 = 898.59 : x
2. Step 2: Convert to fraction form
   1,644.62/2,269.59 = 898.59/x
3. Step 3: Cross multiply
   1,644.62x = 2,269.59 × 898.59
4. Step 4: Simplify right side
   1,644.62x = 2,039,432.06
5. Step 5: Solve for x
   x = 2,039,432.06/1,644.62
6. Step 6: Final answer
   x = 1,240.06