Finding the Fourth Proportional to 3,940.56, 5,435.28 and 2,448.72

Step by Step Solution

1. Step 1: Write the proportion equation
   3,940.56 : 5,435.28 = 2,448.72 : x
2. Step 2: Convert to fraction form
   3,940.56/5,435.28 = 2,448.72/x
3. Step 3: Cross multiply
   3,940.56x = 5,435.28 × 2,448.72
4. Step 4: Simplify right side
   3,940.56x = 13,309,478.84
5. Step 5: Solve for x
   x = 13,309,478.84/3,940.56
6. Step 6: Final answer
   x = 3,377.56