Finding the Fourth Proportional to 3,976.72, 5,485.04 and 2,649.76

Step by Step Solution

1. Step 1: Write the proportion equation
   3,976.72 : 5,485.04 = 2,649.76 : x
2. Step 2: Convert to fraction form
   3,976.72/5,485.04 = 2,649.76/x
3. Step 3: Cross multiply
   3,976.72x = 5,485.04 × 2,649.76
4. Step 4: Simplify right side
   3,976.72x = 14,534,039.59
5. Step 5: Solve for x
   x = 14,534,039.59/3,976.72
6. Step 6: Final answer
   x = 3,654.78