Finding the Fourth Proportional to 2,631.35, 3,946.89 and 683.57

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.35 : 3,946.89 = 683.57 : x
2. Step 2: Convert to fraction form
   2,631.35/3,946.89 = 683.57/x
3. Step 3: Cross multiply
   2,631.35x = 3,946.89 × 683.57
4. Step 4: Simplify right side
   2,631.35x = 2,697,975.60
5. Step 5: Solve for x
   x = 2,697,975.60/2,631.35
6. Step 6: Final answer
   x = 1,025.32