Finding the Fourth Proportional to 2,461.31, 3,691.17 and 817.42

Step by Step Solution

1. Step 1: Write the proportion equation
   2,461.31 : 3,691.17 = 817.42 : x
2. Step 2: Convert to fraction form
   2,461.31/3,691.17 = 817.42/x
3. Step 3: Cross multiply
   2,461.31x = 3,691.17 × 817.42
4. Step 4: Simplify right side
   2,461.31x = 3,017,223.49
5. Step 5: Solve for x
   x = 3,017,223.49/2,461.31
6. Step 6: Final answer
   x = 1,225.86