Finding the Fourth Proportional to 2,015.79, 3,022.56 and 699.18

Step by Step Solution

1. Step 1: Write the proportion equation
   2,015.79 : 3,022.56 = 699.18 : x
2. Step 2: Convert to fraction form
   2,015.79/3,022.56 = 699.18/x
3. Step 3: Cross multiply
   2,015.79x = 3,022.56 × 699.18
4. Step 4: Simplify right side
   2,015.79x = 2,113,313.50
5. Step 5: Solve for x
   x = 2,113,313.50/2,015.79
6. Step 6: Final answer
   x = 1,048.38