Finding the Fourth Proportional to 1,963.27, 2,945.91 and 1,085.61

Step by Step Solution

1. Step 1: Write the proportion equation
   1,963.27 : 2,945.91 = 1,085.61 : x
2. Step 2: Convert to fraction form
   1,963.27/2,945.91 = 1,085.61/x
3. Step 3: Cross multiply
   1,963.27x = 2,945.91 × 1,085.61
4. Step 4: Simplify right side
   1,963.27x = 3,198,089.20
5. Step 5: Solve for x
   x = 3,198,089.20/1,963.27
6. Step 6: Final answer
   x = 1,628.96