Finding the Fourth Proportional to 1,145.61, 1,717.56 and 682.29

Step by Step Solution

1. Step 1: Write the proportion equation
   1,145.61 : 1,717.56 = 682.29 : x
2. Step 2: Convert to fraction form
   1,145.61/1,717.56 = 682.29/x
3. Step 3: Cross multiply
   1,145.61x = 1,717.56 × 682.29
4. Step 4: Simplify right side
   1,145.61x = 1,171,874.01
5. Step 5: Solve for x
   x = 1,171,874.01/1,145.61
6. Step 6: Final answer
   x = 1,022.93