Finding the Fourth Proportional to 2,631.89, 3,947.53 and 684.24

Step by Step Solution

1. Step 1: Write the proportion equation
   2,631.89 : 3,947.53 = 684.24 : x
2. Step 2: Convert to fraction form
   2,631.89/3,947.53 = 684.24/x
3. Step 3: Cross multiply
   2,631.89x = 3,947.53 × 684.24
4. Step 4: Simplify right side
   2,631.89x = 2,701,064.37
5. Step 5: Solve for x
   x = 2,701,064.37/2,631.89
6. Step 6: Final answer
   x = 1,026.28