Finding the Fourth Proportional to 2,665.28, 3,997.15 and 1,020.94

Step by Step Solution

1. Step 1: Write the proportion equation
   2,665.28 : 3,997.15 = 1,020.94 : x
2. Step 2: Convert to fraction form
   2,665.28/3,997.15 = 1,020.94/x
3. Step 3: Cross multiply
   2,665.28x = 3,997.15 × 1,020.94
4. Step 4: Simplify right side
   2,665.28x = 4,080,837.78
5. Step 5: Solve for x
   x = 4,080,837.78/2,665.28
6. Step 6: Final answer
   x = 1,531.11