Finding the Fourth Proportional to 2,390.13, 3,298.78 and 1,395.41

Step by Step Solution

1. Step 1: Write the proportion equation
   2,390.13 : 3,298.78 = 1,395.41 : x
2. Step 2: Convert to fraction form
   2,390.13/3,298.78 = 1,395.41/x
3. Step 3: Cross multiply
   2,390.13x = 3,298.78 × 1,395.41
4. Step 4: Simplify right side
   2,390.13x = 4,603,150.60
5. Step 5: Solve for x
   x = 4,603,150.60/2,390.13
6. Step 6: Final answer
   x = 1,925.90