Finding the Fourth Proportional to 3,945.89, 5,445.18 and 2,177.48

Step by Step Solution

1. Step 1: Write the proportion equation
   3,945.89 : 5,445.18 = 2,177.48 : x
2. Step 2: Convert to fraction form
   3,945.89/5,445.18 = 2,177.48/x
3. Step 3: Cross multiply
   3,945.89x = 5,445.18 × 2,177.48
4. Step 4: Simplify right side
   3,945.89x = 11,856,784.16
5. Step 5: Solve for x
   x = 11,856,784.16/3,945.89
6. Step 6: Final answer
   x = 3,004.84