Finding the Fourth Proportional to 1,447.41, 1,997.46 and 817.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.41 : 1,997.46 = 817.89 : x
2. Step 2: Convert to fraction form
   1,447.41/1,997.46 = 817.89/x
3. Step 3: Cross multiply
   1,447.41x = 1,997.46 × 817.89
4. Step 4: Simplify right side
   1,447.41x = 1,633,702.56
5. Step 5: Solve for x
   x = 1,633,702.56/1,447.41
6. Step 6: Final answer
   x = 1,128.71