Finding the Fourth Proportional to 3,451.46, 5,176.32 and 986.30

Step by Step Solution

1. Step 1: Write the proportion equation
   3,451.46 : 5,176.32 = 986.30 : x
2. Step 2: Convert to fraction form
   3,451.46/5,176.32 = 986.30/x
3. Step 3: Cross multiply
   3,451.46x = 5,176.32 × 986.30
4. Step 4: Simplify right side
   3,451.46x = 5,105,378.53
5. Step 5: Solve for x
   x = 5,105,378.53/3,451.46
6. Step 6: Final answer
   x = 1,479.20