Finding the Fourth Proportional to 2,399, 3,598.72 and 667.64

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399 : 3,598.72 = 667.64 : x
2. Step 2: Convert to fraction form
   2,399/3,598.72 = 667.64/x
3. Step 3: Cross multiply
   2,399x = 3,598.72 × 667.64
4. Step 4: Simplify right side
   2,399x = 2,402,649.42
5. Step 5: Solve for x
   x = 2,402,649.42/2,399
6. Step 6: Final answer
   x = 1,001.52