Finding the Fourth Proportional to 1,447.18, 1,996.63 and 817.63

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.18 : 1,996.63 = 817.63 : x
2. Step 2: Convert to fraction form
   1,447.18/1,996.63 = 817.63/x
3. Step 3: Cross multiply
   1,447.18x = 1,996.63 × 817.63
4. Step 4: Simplify right side
   1,447.18x = 1,632,497.55
5. Step 5: Solve for x
   x = 1,632,497.55/1,447.18
6. Step 6: Final answer
   x = 1,128.06