Finding the Fourth Proportional to 1,644.76, 2,269.74 and 898.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.76 : 2,269.74 = 898.72 : x
2. Step 2: Convert to fraction form
   1,644.76/2,269.74 = 898.72/x
3. Step 3: Cross multiply
   1,644.76x = 2,269.74 × 898.72
4. Step 4: Simplify right side
   1,644.76x = 2,039,860.73
5. Step 5: Solve for x
   x = 2,039,860.73/1,644.76
6. Step 6: Final answer
   x = 1,240.22