Finding the Fourth Proportional to 1,447.16, 1,997.04 and 817.76

Step by Step Solution

1. Step 1: Write the proportion equation
   1,447.16 : 1,997.04 = 817.76 : x
2. Step 2: Convert to fraction form
   1,447.16/1,997.04 = 817.76/x
3. Step 3: Cross multiply
   1,447.16x = 1,997.04 × 817.76
4. Step 4: Simplify right side
   1,447.16x = 1,633,099.43
5. Step 5: Solve for x
   x = 1,633,099.43/1,447.16
6. Step 6: Final answer
   x = 1,128.49