Finding the Fourth Proportional to 2,663.16, 3,994.61 and 1,019.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,663.16 : 3,994.61 = 1,019.58 : x
2. Step 2: Convert to fraction form
   2,663.16/3,994.61 = 1,019.58/x
3. Step 3: Cross multiply
   2,663.16x = 3,994.61 × 1,019.58
4. Step 4: Simplify right side
   2,663.16x = 4,072,824.46
5. Step 5: Solve for x
   x = 4,072,824.46/2,663.16
6. Step 6: Final answer
   x = 1,529.32