Finding the Fourth Proportional to 2,114.75, 3,171.43 and 728.06

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.75 : 3,171.43 = 728.06 : x
2. Step 2: Convert to fraction form
   2,114.75/3,171.43 = 728.06/x
3. Step 3: Cross multiply
   2,114.75x = 3,171.43 × 728.06
4. Step 4: Simplify right side
   2,114.75x = 2,308,974.33
5. Step 5: Solve for x
   x = 2,308,974.33/2,114.75
6. Step 6: Final answer
   x = 1,091.84