Finding the Fourth Proportional to 2,641.05, 3,957.93 and 2,562.21

Step by Step Solution

1. Step 1: Write the proportion equation
   2,641.05 : 3,957.93 = 2,562.21 : x
2. Step 2: Convert to fraction form
   2,641.05/3,957.93 = 2,562.21/x
3. Step 3: Cross multiply
   2,641.05x = 3,957.93 × 2,562.21
4. Step 4: Simplify right side
   2,641.05x = 10,141,047.83
5. Step 5: Solve for x
   x = 10,141,047.83/2,641.05
6. Step 6: Final answer
   x = 3,839.78