Finding the Fourth Proportional to 3,451.69, 5,178.34 and 986.54

Step by Step Solution

1. Step 1: Write the proportion equation
   3,451.69 : 5,178.34 = 986.54 : x
2. Step 2: Convert to fraction form
   3,451.69/5,178.34 = 986.54/x
3. Step 3: Cross multiply
   3,451.69x = 5,178.34 × 986.54
4. Step 4: Simplify right side
   3,451.69x = 5,108,639.54
5. Step 5: Solve for x
   x = 5,108,639.54/3,451.69
6. Step 6: Final answer
   x = 1,480.04