Finding the Fourth Proportional to 2,665.15, 3,997.69 and 1,203.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.15 : 3,997.69 = 1,203.28 : x
2. Step 2: Convert to fraction form
   2,665.15/3,997.69 = 1,203.28/x
3. Step 3: Cross multiply
   2,665.15x = 3,997.69 × 1,203.28
4. Step 4: Simplify right side
   2,665.15x = 4,810,327.42
5. Step 5: Solve for x
   x = 4,810,327.42/2,665.15
6. Step 6: Final answer
   x = 1,804.90