Finding the Fourth Proportional to 3,978.90, 5,956.20 and 3,104.10

Step by Step Solution

1. Step 1: Write the proportion equation
   3,978.90 : 5,956.20 = 3,104.10 : x
2. Step 2: Convert to fraction form
   3,978.90/5,956.20 = 3,104.10/x
3. Step 3: Cross multiply
   3,978.90x = 5,956.20 × 3,104.10
4. Step 4: Simplify right side
   3,978.90x = 18,488,640.42
5. Step 5: Solve for x
   x = 18,488,640.42/3,978.90
6. Step 6: Final answer
   x = 4,646.67