Finding the Fourth Proportional to 2,456.67, 3,685.59 and 813.14

Step by Step Solution

1. Step 1: Write the proportion equation
   2,456.67 : 3,685.59 = 813.14 : x
2. Step 2: Convert to fraction form
   2,456.67/3,685.59 = 813.14/x
3. Step 3: Cross multiply
   2,456.67x = 3,685.59 × 813.14
4. Step 4: Simplify right side
   2,456.67x = 2,996,882.22
5. Step 5: Solve for x
   x = 2,996,882.22/2,456.67
6. Step 6: Final answer
   x = 1,219.90