Finding the Fourth Proportional to 2,417.31, 3,626.78 and 774.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,417.31 : 3,626.78 = 774.09 : x
2. Step 2: Convert to fraction form
   2,417.31/3,626.78 = 774.09/x
3. Step 3: Cross multiply
   2,417.31x = 3,626.78 × 774.09
4. Step 4: Simplify right side
   2,417.31x = 2,807,450.26
5. Step 5: Solve for x
   x = 2,807,450.26/2,417.31
6. Step 6: Final answer
   x = 1,161.39