Finding the Fourth Proportional to 1,411.06, 2,117.03 and 680.71

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.06 : 2,117.03 = 680.71 : x
2. Step 2: Convert to fraction form
   1,411.06/2,117.03 = 680.71/x
3. Step 3: Cross multiply
   1,411.06x = 2,117.03 × 680.71
4. Step 4: Simplify right side
   1,411.06x = 1,441,083.49
5. Step 5: Solve for x
   x = 1,441,083.49/1,411.06
6. Step 6: Final answer
   x = 1,021.28