Finding the Fourth Proportional to 2,640.52, 3,962.31 and 996.76

Step by Step Solution

1. Step 1: Write the proportion equation
   2,640.52 : 3,962.31 = 996.76 : x
2. Step 2: Convert to fraction form
   2,640.52/3,962.31 = 996.76/x
3. Step 3: Cross multiply
   2,640.52x = 3,962.31 × 996.76
4. Step 4: Simplify right side
   2,640.52x = 3,949,472.12
5. Step 5: Solve for x
   x = 3,949,472.12/2,640.52
6. Step 6: Final answer
   x = 1,495.72