Finding the Fourth Proportional to 1,446.67, 1,996.05 and 817.21

Step by Step Solution

1. Step 1: Write the proportion equation
   1,446.67 : 1,996.05 = 817.21 : x
2. Step 2: Convert to fraction form
   1,446.67/1,996.05 = 817.21/x
3. Step 3: Cross multiply
   1,446.67x = 1,996.05 × 817.21
4. Step 4: Simplify right side
   1,446.67x = 1,631,192.02
5. Step 5: Solve for x
   x = 1,631,192.02/1,446.67
6. Step 6: Final answer
   x = 1,127.55