Finding the Fourth Proportional to 2,114.82, 3,171.53 and 728.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,114.82 : 3,171.53 = 728.12 : x
2. Step 2: Convert to fraction form
   2,114.82/3,171.53 = 728.12/x
3. Step 3: Cross multiply
   2,114.82x = 3,171.53 × 728.12
4. Step 4: Simplify right side
   2,114.82x = 2,309,242.85
5. Step 5: Solve for x
   x = 2,309,242.85/2,114.82
6. Step 6: Final answer
   x = 1,091.94