Finding the Fourth Proportional to 1,447.40, 1,997.41 and 817.93

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.40 : 1,997.41 = 817.93 : x
2. Step 2: Convert to fraction form
   1,447.40/1,997.41 = 817.93/x
3. Step 3: Cross multiply
   1,447.40x = 1,997.41 × 817.93
4. Step 4: Simplify right side
   1,447.40x = 1,633,741.56
5. Step 5: Solve for x
   x = 1,633,741.56/1,447.40
6. Step 6: Final answer
   x = 1,128.74