Finding the Fourth Proportional to 1,629.77, 2,443.28 and 1,108.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,629.77 : 2,443.28 = 1,108.31 : x
2. Step 2: Convert to fraction form
   1,629.77/2,443.28 = 1,108.31/x
3. Step 3: Cross multiply
   1,629.77x = 2,443.28 × 1,108.31
4. Step 4: Simplify right side
   1,629.77x = 2,707,914.43
5. Step 5: Solve for x
   x = 2,707,914.43/1,629.77
6. Step 6: Final answer
   x = 1,661.53