Finding the Fourth Proportional to 1,636.34, 2,456.98 and 817.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,636.34 : 2,456.98 = 817.42 : x
2. Step 2: Convert to fraction form
   1,636.34/2,456.98 = 817.42/x
3. Step 3: Cross multiply
   1,636.34x = 2,456.98 × 817.42
4. Step 4: Simplify right side
   1,636.34x = 2,008,384.59
5. Step 5: Solve for x
   x = 2,008,384.59/1,636.34
6. Step 6: Final answer
   x = 1,227.36