Finding the Fourth Proportional to 1,644.48, 2,270.16 and 945.72

Step by Step Solution

1. Step 1: Write the proportion equation
   1,644.48 : 2,270.16 = 945.72 : x
2. Step 2: Convert to fraction form
   1,644.48/2,270.16 = 945.72/x
3. Step 3: Cross multiply
   1,644.48x = 2,270.16 × 945.72
4. Step 4: Simplify right side
   1,644.48x = 2,146,935.72
5. Step 5: Solve for x
   x = 2,146,935.72/1,644.48
6. Step 6: Final answer
   x = 1,305.54