Finding the Fourth Proportional to 2,663.31, 3,994.79 and 1,020.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.31 : 3,994.79 = 1,020.03 : x
2. Step 2: Convert to fraction form
   2,663.31/3,994.79 = 1,020.03/x
3. Step 3: Cross multiply
   2,663.31x = 3,994.79 × 1,020.03
4. Step 4: Simplify right side
   2,663.31x = 4,074,800.54
5. Step 5: Solve for x
   x = 4,074,800.54/2,663.31
6. Step 6: Final answer
   x = 1,529.98