Finding the Fourth Proportional to 2,459.82, 3,689.36 and 816.38

Step by Step Solution

1. Step 1: Write the proportion equation
   2,459.82 : 3,689.36 = 816.38 : x
2. Step 2: Convert to fraction form
   2,459.82/3,689.36 = 816.38/x
3. Step 3: Cross multiply
   2,459.82x = 3,689.36 × 816.38
4. Step 4: Simplify right side
   2,459.82x = 3,011,919.72
5. Step 5: Solve for x
   x = 3,011,919.72/2,459.82
6. Step 6: Final answer
   x = 1,224.45