Finding the Fourth Proportional to 1,644.60, 2,269.56 and 898.56

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.60 : 2,269.56 = 898.56 : x
2. Step 2: Convert to fraction form
   1,644.60/2,269.56 = 898.56/x
3. Step 3: Cross multiply
   1,644.60x = 2,269.56 × 898.56
4. Step 4: Simplify right side
   1,644.60x = 2,039,335.83
5. Step 5: Solve for x
   x = 2,039,335.83/1,644.60
6. Step 6: Final answer
   x = 1,240.02