Finding the Fourth Proportional to 1,644.47, 2,269.33 and 898.41

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.47 : 2,269.33 = 898.41 : x
2. Step 2: Convert to fraction form
   1,644.47/2,269.33 = 898.41/x
3. Step 3: Cross multiply
   1,644.47x = 2,269.33 × 898.41
4. Step 4: Simplify right side
   1,644.47x = 2,038,788.77
5. Step 5: Solve for x
   x = 2,038,788.77/1,644.47
6. Step 6: Final answer
   x = 1,239.78