Finding the Fourth Proportional to 1,411.72, 2,117.82 and 681.28

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.72 : 2,117.82 = 681.28 : x
2. Step 2: Convert to fraction form
   1,411.72/2,117.82 = 681.28/x
3. Step 3: Cross multiply
   1,411.72x = 2,117.82 × 681.28
4. Step 4: Simplify right side
   1,411.72x = 1,442,828.41
5. Step 5: Solve for x
   x = 1,442,828.41/1,411.72
6. Step 6: Final answer
   x = 1,022.04