Finding the Fourth Proportional to 3,977.60, 5,484.15 and 2,648.39

Step by Step Solution

1. Step 1: Write the proportion equation
   3,977.60 : 5,484.15 = 2,648.39 : x
2. Step 2: Convert to fraction form
   3,977.60/5,484.15 = 2,648.39/x
3. Step 3: Cross multiply
   3,977.60x = 5,484.15 × 2,648.39
4. Step 4: Simplify right side
   3,977.60x = 14,524,140.60
5. Step 5: Solve for x
   x = 14,524,140.60/3,977.60
6. Step 6: Final answer
   x = 3,651.49