Finding the Fourth Proportional to 1,644.74, 2,269.76 and 898.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.74 : 2,269.76 = 898.72 : x
2. Step 2: Convert to fraction form
   1,644.74/2,269.76 = 898.72/x
3. Step 3: Cross multiply
   1,644.74x = 2,269.76 × 898.72
4. Step 4: Simplify right side
   1,644.74x = 2,039,878.71
5. Step 5: Solve for x
   x = 2,039,878.71/1,644.74
6. Step 6: Final answer
   x = 1,240.24