Finding the Fourth Proportional to 1,215.83, 1,677.17 and 843.03

Step by Step Solution

1. Step 1: Write the proportion equation
   1,215.83 : 1,677.17 = 843.03 : x
2. Step 2: Convert to fraction form
   1,215.83/1,677.17 = 843.03/x
3. Step 3: Cross multiply
   1,215.83x = 1,677.17 × 843.03
4. Step 4: Simplify right side
   1,215.83x = 1,413,906.73
5. Step 5: Solve for x
   x = 1,413,906.73/1,215.83
6. Step 6: Final answer
   x = 1,162.91