Finding the Fourth Proportional to 2,460.69, 3,689.51 and 816.81

Step by Step Solution

1. Step 1: Write the proportion equation
   2,460.69 : 3,689.51 = 816.81 : x
2. Step 2: Convert to fraction form
   2,460.69/3,689.51 = 816.81/x
3. Step 3: Cross multiply
   2,460.69x = 3,689.51 × 816.81
4. Step 4: Simplify right side
   2,460.69x = 3,013,624.58
5. Step 5: Solve for x
   x = 3,013,624.58/2,460.69
6. Step 6: Final answer
   x = 1,224.71