Finding the Fourth Proportional to 1,644.51, 2,269.17 and 945.75

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.51 : 2,269.17 = 945.75 : x
2. Step 2: Convert to fraction form
   1,644.51/2,269.17 = 945.75/x
3. Step 3: Cross multiply
   1,644.51x = 2,269.17 × 945.75
4. Step 4: Simplify right side
   1,644.51x = 2,146,067.53
5. Step 5: Solve for x
   x = 2,146,067.53/1,644.51
6. Step 6: Final answer
   x = 1,304.99