Finding the Fourth Proportional to 1,644.31, 2,269.16 and 898.27

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.31 : 2,269.16 = 898.27 : x
2. Step 2: Convert to fraction form
   1,644.31/2,269.16 = 898.27/x
3. Step 3: Cross multiply
   1,644.31x = 2,269.16 × 898.27
4. Step 4: Simplify right side
   1,644.31x = 2,038,313.86
5. Step 5: Solve for x
   x = 2,038,313.86/1,644.31
6. Step 6: Final answer
   x = 1,239.62