Finding the Fourth Proportional to 2,456.78, 3,685.86 and 996.98

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.78 : 3,685.86 = 996.98 : x
2. Step 2: Convert to fraction form
   2,456.78/3,685.86 = 996.98/x
3. Step 3: Cross multiply
   2,456.78x = 3,685.86 × 996.98
4. Step 4: Simplify right side
   2,456.78x = 3,674,710.27
5. Step 5: Solve for x
   x = 3,674,710.27/2,456.78
6. Step 6: Final answer
   x = 1,495.75