Finding the Fourth Proportional to 3,978.16, 5,486.88 and 2,404.24

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.16 : 5,486.88 = 2,404.24 : x
2. Step 2: Convert to fraction form
   3,978.16/5,486.88 = 2,404.24/x
3. Step 3: Cross multiply
   3,978.16x = 5,486.88 × 2,404.24
4. Step 4: Simplify right side
   3,978.16x = 13,191,776.37
5. Step 5: Solve for x
   x = 13,191,776.37/3,978.16
6. Step 6: Final answer
   x = 3,316.05