Finding the Fourth Proportional to 5,641.24, 7,776.76 and 3,957.42

Step by Step Solution

1. Step 1: Write the proportion equation
   5,641.24 : 7,776.76 = 3,957.42 : x
2. Step 2: Convert to fraction form
   5,641.24/7,776.76 = 3,957.42/x
3. Step 3: Cross multiply
   5,641.24x = 7,776.76 × 3,957.42
4. Step 4: Simplify right side
   5,641.24x = 30,775,905.56
5. Step 5: Solve for x
   x = 30,775,905.56/5,641.24
6. Step 6: Final answer
   x = 5,455.52