Finding the Fourth Proportional to 3,948.72, 5,910.48 and 2,777.28

Step by Step Solution

1. Step 1: Write the proportion equation
   3,948.72 : 5,910.48 = 2,777.28 : x
2. Step 2: Convert to fraction form
   3,948.72/5,910.48 = 2,777.28/x
3. Step 3: Cross multiply
   3,948.72x = 5,910.48 × 2,777.28
4. Step 4: Simplify right side
   3,948.72x = 16,415,057.89
5. Step 5: Solve for x
   x = 16,415,057.89/3,948.72
6. Step 6: Final answer
   x = 4,157.06