Finding the Fourth Proportional to 2,114.37, 3,171.15 and 728.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.37 : 3,171.15 = 728.60 : x
2. Step 2: Convert to fraction form
   2,114.37/3,171.15 = 728.60/x
3. Step 3: Cross multiply
   2,114.37x = 3,171.15 × 728.60
4. Step 4: Simplify right side
   2,114.37x = 2,310,484.03
5. Step 5: Solve for x
   x = 2,310,484.03/2,114.37
6. Step 6: Final answer
   x = 1,092.75