Finding the Fourth Proportional to 2,662.79, 3,994.05 and 1,019.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,662.79 : 3,994.05 = 1,019.21 : x
2. Step 2: Convert to fraction form
   2,662.79/3,994.05 = 1,019.21/x
3. Step 3: Cross multiply
   2,662.79x = 3,994.05 × 1,019.21
4. Step 4: Simplify right side
   2,662.79x = 4,070,775.70
5. Step 5: Solve for x
   x = 4,070,775.70/2,662.79
6. Step 6: Final answer
   x = 1,528.76