Finding the Fourth Proportional to 2,401.28, 3,313.60 and 1,353.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,401.28 : 3,313.60 = 1,353.12 : x
2. Step 2: Convert to fraction form
   2,401.28/3,313.60 = 1,353.12/x
3. Step 3: Cross multiply
   2,401.28x = 3,313.60 × 1,353.12
4. Step 4: Simplify right side
   2,401.28x = 4,483,698.43
5. Step 5: Solve for x
   x = 4,483,698.43/2,401.28
6. Step 6: Final answer
   x = 1,867.21