Finding the Fourth Proportional to 1,628.57, 2,443.37 and 1,107.81

Step by Step Solution

1. Step 1: Write the proportion equation
   1,628.57 : 2,443.37 = 1,107.81 : x
2. Step 2: Convert to fraction form
   1,628.57/2,443.37 = 1,107.81/x
3. Step 3: Cross multiply
   1,628.57x = 2,443.37 × 1,107.81
4. Step 4: Simplify right side
   1,628.57x = 2,706,784.18
5. Step 5: Solve for x
   x = 2,706,784.18/1,628.57
6. Step 6: Final answer
   x = 1,662.06