Finding the Fourth Proportional to 6,494.76, 8,960.78 and 3,974.21

Step by Step Solution

1. Step 1: Write the proportion equation
   6,494.76 : 8,960.78 = 3,974.21 : x
2. Step 2: Convert to fraction form
   6,494.76/8,960.78 = 3,974.21/x
3. Step 3: Cross multiply
   6,494.76x = 8,960.78 × 3,974.21
4. Step 4: Simplify right side
   6,494.76x = 35,611,956.81
5. Step 5: Solve for x
   x = 35,611,956.81/6,494.76
6. Step 6: Final answer
   x = 5,483.18