Finding the Fourth Proportional to 2,461.50, 3,690.78 and 817.62

Step by Step Solution

1. Step 1: Write the proportion equation
   2,461.50 : 3,690.78 = 817.62 : x
2. Step 2: Convert to fraction form
   2,461.50/3,690.78 = 817.62/x
3. Step 3: Cross multiply
   2,461.50x = 3,690.78 × 817.62
4. Step 4: Simplify right side
   2,461.50x = 3,017,655.54
5. Step 5: Solve for x
   x = 3,017,655.54/2,461.50
6. Step 6: Final answer
   x = 1,225.94