Finding the Fourth Proportional to 2,460.09, 3,690.69 and 816.60

Step by Step Solution

1. Step 1: Write the proportion equation
   2,460.09 : 3,690.69 = 816.60 : x
2. Step 2: Convert to fraction form
   2,460.09/3,690.69 = 816.60/x
3. Step 3: Cross multiply
   2,460.09x = 3,690.69 × 816.60
4. Step 4: Simplify right side
   2,460.09x = 3,013,817.45
5. Step 5: Solve for x
   x = 3,013,817.45/2,460.09
6. Step 6: Final answer
   x = 1,225.08