Finding the Fourth Proportional to 2,159.69, 3,236.78 and 1,379.45

Step by Step Solution

1. Step 1: Write the proportion equation
   2,159.69 : 3,236.78 = 1,379.45 : x
2. Step 2: Convert to fraction form
   2,159.69/3,236.78 = 1,379.45/x
3. Step 3: Cross multiply
   2,159.69x = 3,236.78 × 1,379.45
4. Step 4: Simplify right side
   2,159.69x = 4,464,987.71
5. Step 5: Solve for x
   x = 4,464,987.71/2,159.69
6. Step 6: Final answer
   x = 2,067.43