Finding the Fourth Proportional to 1,722.24, 2,581.56 and 681.82

Step by Step Solution

1. Step 1: Write the proportion equation
   1,722.24 : 2,581.56 = 681.82 : x
2. Step 2: Convert to fraction form
   1,722.24/2,581.56 = 681.82/x
3. Step 3: Cross multiply
   1,722.24x = 2,581.56 × 681.82
4. Step 4: Simplify right side
   1,722.24x = 1,760,152.79
5. Step 5: Solve for x
   x = 1,760,152.79/1,722.24
6. Step 6: Final answer
   x = 1,022.01