Finding the Fourth Proportional to 2,081.26, 3,117.57 and 1,617.40

Step by Step Solution

1. Step 1: Write the proportion equation
   2,081.26 : 3,117.57 = 1,617.40 : x
2. Step 2: Convert to fraction form
   2,081.26/3,117.57 = 1,617.40/x
3. Step 3: Cross multiply
   2,081.26x = 3,117.57 × 1,617.40
4. Step 4: Simplify right side
   2,081.26x = 5,042,357.72
5. Step 5: Solve for x
   x = 5,042,357.72/2,081.26
6. Step 6: Final answer
   x = 2,422.74