Finding the Fourth Proportional to 5,520.42, 7,614.81 and 3,945.78

Step by Step Solution

1. Step 1: Write the proportion equation
   5,520.42 : 7,614.81 = 3,945.78 : x
2. Step 2: Convert to fraction form
   5,520.42/7,614.81 = 3,945.78/x
3. Step 3: Cross multiply
   5,520.42x = 7,614.81 × 3,945.78
4. Step 4: Simplify right side
   5,520.42x = 30,046,365.00
5. Step 5: Solve for x
   x = 30,046,365.00/5,520.42
6. Step 6: Final answer
   x = 5,442.77