Finding the Fourth Proportional to 1,446.81, 1,996.47 and 817.31

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.81 : 1,996.47 = 817.31 : x
2. Step 2: Convert to fraction form
   1,446.81/1,996.47 = 817.31/x
3. Step 3: Cross multiply
   1,446.81x = 1,996.47 × 817.31
4. Step 4: Simplify right side
   1,446.81x = 1,631,724.91
5. Step 5: Solve for x
   x = 1,631,724.91/1,446.81
6. Step 6: Final answer
   x = 1,127.81