Finding the Fourth Proportional to 2,377.98, 3,567.17 and 817.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,377.98 : 3,567.17 = 817.72 : x
2. Step 2: Convert to fraction form
   2,377.98/3,567.17 = 817.72/x
3. Step 3: Cross multiply
   2,377.98x = 3,567.17 × 817.72
4. Step 4: Simplify right side
   2,377.98x = 2,916,939.38
5. Step 5: Solve for x
   x = 2,916,939.38/2,377.98
6. Step 6: Final answer
   x = 1,226.65