Finding the Fourth Proportional to 1,107.89, 1,659.13 and 1,078.73

Step by Step Solution

1. Step 1: Write the proportion equation
   1,107.89 : 1,659.13 = 1,078.73 : x
2. Step 2: Convert to fraction form
   1,107.89/1,659.13 = 1,078.73/x
3. Step 3: Cross multiply
   1,107.89x = 1,659.13 × 1,078.73
4. Step 4: Simplify right side
   1,107.89x = 1,789,753.30
5. Step 5: Solve for x
   x = 1,789,753.30/1,107.89
6. Step 6: Final answer
   x = 1,615.46