Finding the Fourth Proportional to 3,978.96, 5,493.72 and 2,409.84

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.96 : 5,493.72 = 2,409.84 : x
2. Step 2: Convert to fraction form
   3,978.96/5,493.72 = 2,409.84/x
3. Step 3: Cross multiply
   3,978.96x = 5,493.72 × 2,409.84
4. Step 4: Simplify right side
   3,978.96x = 13,238,986.20
5. Step 5: Solve for x
   x = 13,238,986.20/3,978.96
6. Step 6: Final answer
   x = 3,327.25