Finding the Fourth Proportional to 2,399.16, 3,315.40 and 1,808.68

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.16 : 3,315.40 = 1,808.68 : x
2. Step 2: Convert to fraction form
   2,399.16/3,315.40 = 1,808.68/x
3. Step 3: Cross multiply
   2,399.16x = 3,315.40 × 1,808.68
4. Step 4: Simplify right side
   2,399.16x = 5,996,497.67
5. Step 5: Solve for x
   x = 5,996,497.67/2,399.16
6. Step 6: Final answer
   x = 2,499.42