Finding the Fourth Proportional to 2,460.65, 3,690.17 and 816.75

Step by Step Solution

1. Step 1: Write the proportion equation
   2,460.65 : 3,690.17 = 816.75 : x
2. Step 2: Convert to fraction form
   2,460.65/3,690.17 = 816.75/x
3. Step 3: Cross multiply
   2,460.65x = 3,690.17 × 816.75
4. Step 4: Simplify right side
   2,460.65x = 3,013,945.33
5. Step 5: Solve for x
   x = 3,013,945.33/2,460.65
6. Step 6: Final answer
   x = 1,224.86