Finding the Fourth Proportional to 2,453.30, 3,680.07 and 809.99

Step by Step Solution

1. Step 1: Write the proportion equation
   2,453.30 : 3,680.07 = 809.99 : x
2. Step 2: Convert to fraction form
   2,453.30/3,680.07 = 809.99/x
3. Step 3: Cross multiply
   2,453.30x = 3,680.07 × 809.99
4. Step 4: Simplify right side
   2,453.30x = 2,980,819.90
5. Step 5: Solve for x
   x = 2,980,819.90/2,453.30
6. Step 6: Final answer
   x = 1,215.02