Finding the Fourth Proportional to 1,411.43, 2,115.32 and 680.00

Step by Step Solution

1. Step 1: Write the proportion equation
   1,411.43 : 2,115.32 = 680.00 : x
2. Step 2: Convert to fraction form
   1,411.43/2,115.32 = 680.00/x
3. Step 3: Cross multiply
   1,411.43x = 2,115.32 × 680.00
4. Step 4: Simplify right side
   1,411.43x = 1,438,403.62
5. Step 5: Solve for x
   x = 1,438,403.62/1,411.43
6. Step 6: Final answer
   x = 1,019.11