Finding the Fourth Proportional to 1,447.29, 1,997.25 and 817.95

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.29 : 1,997.25 = 817.95 : x
2. Step 2: Convert to fraction form
   1,447.29/1,997.25 = 817.95/x
3. Step 3: Cross multiply
   1,447.29x = 1,997.25 × 817.95
4. Step 4: Simplify right side
   1,447.29x = 1,633,650.64
5. Step 5: Solve for x
   x = 1,633,650.64/1,447.29
6. Step 6: Final answer
   x = 1,128.77