Finding the Fourth Proportional to 2,114.89, 3,172.55 and 728.04

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.89 : 3,172.55 = 728.04 : x
2. Step 2: Convert to fraction form
   2,114.89/3,172.55 = 728.04/x
3. Step 3: Cross multiply
   2,114.89x = 3,172.55 × 728.04
4. Step 4: Simplify right side
   2,114.89x = 2,309,743.30
5. Step 5: Solve for x
   x = 2,309,743.30/2,114.89
6. Step 6: Final answer
   x = 1,092.13