Finding the Fourth Proportional to 2,644.27, 3,961.50 and 1,326.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,644.27 : 3,961.50 = 1,326.48 : x
2. Step 2: Convert to fraction form
   2,644.27/3,961.50 = 1,326.48/x
3. Step 3: Cross multiply
   2,644.27x = 3,961.50 × 1,326.48
4. Step 4: Simplify right side
   2,644.27x = 5,254,850.52
5. Step 5: Solve for x
   x = 5,254,850.52/2,644.27
6. Step 6: Final answer
   x = 1,987.26