Finding the Fourth Proportional to 2,382.39, 3,568.37 and 991.51

Step by Step Solution

1. Step 1: Write the proportion equation
   2,382.39 : 3,568.37 = 991.51 : x
2. Step 2: Convert to fraction form
   2,382.39/3,568.37 = 991.51/x
3. Step 3: Cross multiply
   2,382.39x = 3,568.37 × 991.51
4. Step 4: Simplify right side
   2,382.39x = 3,538,074.54
5. Step 5: Solve for x
   x = 3,538,074.54/2,382.39
6. Step 6: Final answer
   x = 1,485.09