Finding the Fourth Proportional to 2,619.69, 3,947.48 and 2,167.61

Step by Step Solution

1. Step 1: Write the proportion equation
   2,619.69 : 3,947.48 = 2,167.61 : x
2. Step 2: Convert to fraction form
   2,619.69/3,947.48 = 2,167.61/x
3. Step 3: Cross multiply
   2,619.69x = 3,947.48 × 2,167.61
4. Step 4: Simplify right side
   2,619.69x = 8,556,609.07
5. Step 5: Solve for x
   x = 8,556,609.07/2,619.69
6. Step 6: Final answer
   x = 3,266.27