Finding the Fourth Proportional to 1,792.01, 2,687.72 and 817.89

Step by Step Solution

1. Step 1: Write the proportion equation
   1,792.01 : 2,687.72 = 817.89 : x
2. Step 2: Convert to fraction form
   1,792.01/2,687.72 = 817.89/x
3. Step 3: Cross multiply
   1,792.01x = 2,687.72 × 817.89
4. Step 4: Simplify right side
   1,792.01x = 2,198,241.78
5. Step 5: Solve for x
   x = 2,198,241.78/1,792.01
6. Step 6: Final answer
   x = 1,226.69