Finding the Fourth Proportional to 2,226.79, 3,340.59 and 765.59

Step by Step Solution

1. Step 1: Write the proportion equation
   2,226.79 : 3,340.59 = 765.59 : x
2. Step 2: Convert to fraction form
   2,226.79/3,340.59 = 765.59/x
3. Step 3: Cross multiply
   2,226.79x = 3,340.59 × 765.59
4. Step 4: Simplify right side
   2,226.79x = 2,557,507.03
5. Step 5: Solve for x
   x = 2,557,507.03/2,226.79
6. Step 6: Final answer
   x = 1,148.52