Finding the Fourth Proportional to 2,116.89, 3,158.57 and 2,104.65

Step by Step Solution

1. Step 1: Write the proportion equation
   2,116.89 : 3,158.57 = 2,104.65 : x
2. Step 2: Convert to fraction form
   2,116.89/3,158.57 = 2,104.65/x
3. Step 3: Cross multiply
   2,116.89x = 3,158.57 × 2,104.65
4. Step 4: Simplify right side
   2,116.89x = 6,647,689.61
5. Step 5: Solve for x
   x = 6,647,689.61/2,116.89
6. Step 6: Final answer
   x = 3,140.31