Finding the Fourth Proportional to 2,407.69, 3,322.38 and 1,399.12

Step by Step Solution

1. Step 1: Write the proportion equation
   2,407.69 : 3,322.38 = 1,399.12 : x
2. Step 2: Convert to fraction form
   2,407.69/3,322.38 = 1,399.12/x
3. Step 3: Cross multiply
   2,407.69x = 3,322.38 × 1,399.12
4. Step 4: Simplify right side
   2,407.69x = 4,648,408.31
5. Step 5: Solve for x
   x = 4,648,408.31/2,407.69
6. Step 6: Final answer
   x = 1,930.65