Finding the Fourth Proportional to 2,399.38, 3,596.91 and 917.58

Step by Step Solution

1. Step 1: Write the proportion equation
   2,399.38 : 3,596.91 = 917.58 : x
2. Step 2: Convert to fraction form
   2,399.38/3,596.91 = 917.58/x
3. Step 3: Cross multiply
   2,399.38x = 3,596.91 × 917.58
4. Step 4: Simplify right side
   2,399.38x = 3,300,448.97
5. Step 5: Solve for x
   x = 3,300,448.97/2,399.38
6. Step 6: Final answer
   x = 1,375.54