Finding the Fourth Proportional to 2,419.58, 3,629.10 and 664.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,419.58 : 3,629.10 = 664.72 : x
2. Step 2: Convert to fraction form
   2,419.58/3,629.10 = 664.72/x
3. Step 3: Cross multiply
   2,419.58x = 3,629.10 × 664.72
4. Step 4: Simplify right side
   2,419.58x = 2,412,326.28
5. Step 5: Solve for x
   x = 2,412,326.28/2,419.58
6. Step 6: Final answer
   x = 997.00