Finding the Fourth Proportional to 2,399.20, 3,598.56 and 667.84

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.20 : 3,598.56 = 667.84 : x
2. Step 2: Convert to fraction form
   2,399.20/3,598.56 = 667.84/x
3. Step 3: Cross multiply
   2,399.20x = 3,598.56 × 667.84
4. Step 4: Simplify right side
   2,399.20x = 2,403,262.31
5. Step 5: Solve for x
   x = 2,403,262.31/2,399.20
6. Step 6: Final answer
   x = 1,001.69