Finding the Fourth Proportional to 2,644.31, 3,963.60 and 1,162.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,644.31 : 3,963.60 = 1,162.21 : x
2. Step 2: Convert to fraction form
   2,644.31/3,963.60 = 1,162.21/x
3. Step 3: Cross multiply
   2,644.31x = 3,963.60 × 1,162.21
4. Step 4: Simplify right side
   2,644.31x = 4,606,530.01
5. Step 5: Solve for x
   x = 4,606,530.01/2,644.31
6. Step 6: Final answer
   x = 1,742.06