Finding the Fourth Proportional to 2,456.90, 3,682.20 and 1,636.78

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.90 : 3,682.20 = 1,636.78 : x
2. Step 2: Convert to fraction form
   2,456.90/3,682.20 = 1,636.78/x
3. Step 3: Cross multiply
   2,456.90x = 3,682.20 × 1,636.78
4. Step 4: Simplify right side
   2,456.90x = 6,026,951.32
5. Step 5: Solve for x
   x = 6,026,951.32/2,456.90
6. Step 6: Final answer
   x = 2,453.07