Finding the Fourth Proportional to 1,962.89, 2,945.34 and 1,085.23

Step by Step Solution

1. Step 1: Write the proportion equation
   1,962.89 : 2,945.34 = 1,085.23 : x
2. Step 2: Convert to fraction form
   1,962.89/2,945.34 = 1,085.23/x
3. Step 3: Cross multiply
   1,962.89x = 2,945.34 × 1,085.23
4. Step 4: Simplify right side
   1,962.89x = 3,196,366.68
5. Step 5: Solve for x
   x = 3,196,366.68/1,962.89
6. Step 6: Final answer
   x = 1,628.40