Finding the Fourth Proportional to 2,390.15, 3,298.41 and 1,328.09

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.15 : 3,298.41 = 1,328.09 : x
2. Step 2: Convert to fraction form
   2,390.15/3,298.41 = 1,328.09/x
3. Step 3: Cross multiply
   2,390.15x = 3,298.41 × 1,328.09
4. Step 4: Simplify right side
   2,390.15x = 4,380,568.84
5. Step 5: Solve for x
   x = 4,380,568.84/2,390.15
6. Step 6: Final answer
   x = 1,832.76