Finding the Fourth Proportional to 3,451.53, 5,178.15 and 986.37

Step by Step Solution

1. Step 1: Write the proportion equation
   3,451.53 : 5,178.15 = 986.37 : x
2. Step 2: Convert to fraction form
   3,451.53/5,178.15 = 986.37/x
3. Step 3: Cross multiply
   3,451.53x = 5,178.15 × 986.37
4. Step 4: Simplify right side
   3,451.53x = 5,107,571.82
5. Step 5: Solve for x
   x = 5,107,571.82/3,451.53
6. Step 6: Final answer
   x = 1,479.80