Finding the Fourth Proportional to 1,228.15, 1,694.82 and 676.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,228.15 : 1,694.82 = 676.15 : x
2. Step 2: Convert to fraction form
   1,228.15/1,694.82 = 676.15/x
3. Step 3: Cross multiply
   1,228.15x = 1,694.82 × 676.15
4. Step 4: Simplify right side
   1,228.15x = 1,145,945.76
5. Step 5: Solve for x
   x = 1,145,945.76/1,228.15
6. Step 6: Final answer
   x = 933.07