Finding the Fourth Proportional to 2,417.72, 3,626.56 and 774.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,417.72 : 3,626.56 = 774.40 : x
2. Step 2: Convert to fraction form
   2,417.72/3,626.56 = 774.40/x
3. Step 3: Cross multiply
   2,417.72x = 3,626.56 × 774.40
4. Step 4: Simplify right side
   2,417.72x = 2,808,408.06
5. Step 5: Solve for x
   x = 2,808,408.06/2,417.72
6. Step 6: Final answer
   x = 1,161.59