Finding the Fourth Proportional to 1,411.07, 2,116.06 and 680.45

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.07 : 2,116.06 = 680.45 : x
2. Step 2: Convert to fraction form
   1,411.07/2,116.06 = 680.45/x
3. Step 3: Cross multiply
   1,411.07x = 2,116.06 × 680.45
4. Step 4: Simplify right side
   1,411.07x = 1,439,873.03
5. Step 5: Solve for x
   x = 1,439,873.03/1,411.07
6. Step 6: Final answer
   x = 1,020.41