Finding the Fourth Proportional to 2,663.55, 3,993.03 and 1,019.79

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.55 : 3,993.03 = 1,019.79 : x
2. Step 2: Convert to fraction form
   2,663.55/3,993.03 = 1,019.79/x
3. Step 3: Cross multiply
   2,663.55x = 3,993.03 × 1,019.79
4. Step 4: Simplify right side
   2,663.55x = 4,072,052.06
5. Step 5: Solve for x
   x = 4,072,052.06/2,663.55
6. Step 6: Final answer
   x = 1,528.81