Finding the Fourth Proportional to 2,641.50, 3,958.74 and 2,057.22

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.50 : 3,958.74 = 2,057.22 : x
2. Step 2: Convert to fraction form
   2,641.50/3,958.74 = 2,057.22/x
3. Step 3: Cross multiply
   2,641.50x = 3,958.74 × 2,057.22
4. Step 4: Simplify right side
   2,641.50x = 8,143,999.10
5. Step 5: Solve for x
   x = 8,143,999.10/2,641.50
6. Step 6: Final answer
   x = 3,083.10