Finding the Fourth Proportional to 1,644.31, 2,269.25 and 981.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.31 : 2,269.25 = 981.33 : x
2. Step 2: Convert to fraction form
   1,644.31/2,269.25 = 981.33/x
3. Step 3: Cross multiply
   1,644.31x = 2,269.25 × 981.33
4. Step 4: Simplify right side
   1,644.31x = 2,226,883.10
5. Step 5: Solve for x
   x = 2,226,883.10/1,644.31
6. Step 6: Final answer
   x = 1,354.30