Finding the Fourth Proportional to 2,648.28, 3,970.94 and 1,004.36

Step by Step Solution

1. Step 1: Write the proportion equation
   2,648.28 : 3,970.94 = 1,004.36 : x
2. Step 2: Convert to fraction form
   2,648.28/3,970.94 = 1,004.36/x
3. Step 3: Cross multiply
   2,648.28x = 3,970.94 × 1,004.36
4. Step 4: Simplify right side
   2,648.28x = 3,988,253.30
5. Step 5: Solve for x
   x = 3,988,253.30/2,648.28
6. Step 6: Final answer
   x = 1,505.98