Finding the Fourth Proportional to 2,631.72, 3,947.74 and 683.96

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.72 : 3,947.74 = 683.96 : x
2. Step 2: Convert to fraction form
   2,631.72/3,947.74 = 683.96/x
3. Step 3: Cross multiply
   2,631.72x = 3,947.74 × 683.96
4. Step 4: Simplify right side
   2,631.72x = 2,700,096.25
5. Step 5: Solve for x
   x = 2,700,096.25/2,631.72
6. Step 6: Final answer
   x = 1,025.98