Finding the Fourth Proportional to 1,446.78, 1,996.59 and 817.51

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.78 : 1,996.59 = 817.51 : x
2. Step 2: Convert to fraction form
   1,446.78/1,996.59 = 817.51/x
3. Step 3: Cross multiply
   1,446.78x = 1,996.59 × 817.51
4. Step 4: Simplify right side
   1,446.78x = 1,632,232.29
5. Step 5: Solve for x
   x = 1,632,232.29/1,446.78
6. Step 6: Final answer
   x = 1,128.18