Finding the Fourth Proportional to 2,417.83, 3,626.78 and 686.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,417.83 : 3,626.78 = 686.45 : x
2. Step 2: Convert to fraction form
   2,417.83/3,626.78 = 686.45/x
3. Step 3: Cross multiply
   2,417.83x = 3,626.78 × 686.45
4. Step 4: Simplify right side
   2,417.83x = 2,489,608.77
5. Step 5: Solve for x
   x = 2,489,608.77/2,417.83
6. Step 6: Final answer
   x = 1,029.69