Finding the Fourth Proportional to 2,663.06, 3,994.41 and 1,019.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.06 : 3,994.41 = 1,019.78 : x
2. Step 2: Convert to fraction form
   2,663.06/3,994.41 = 1,019.78/x
3. Step 3: Cross multiply
   2,663.06x = 3,994.41 × 1,019.78
4. Step 4: Simplify right side
   2,663.06x = 4,073,419.43
5. Step 5: Solve for x
   x = 4,073,419.43/2,663.06
6. Step 6: Final answer
   x = 1,529.60