Finding the Fourth Proportional to 2,629.87, 3,946.22 and 986.28

Step by Step Solution

1. Step 1: Write the proportion equation
   2,629.87 : 3,946.22 = 986.28 : x
2. Step 2: Convert to fraction form
   2,629.87/3,946.22 = 986.28/x
3. Step 3: Cross multiply
   2,629.87x = 3,946.22 × 986.28
4. Step 4: Simplify right side
   2,629.87x = 3,892,061.83
5. Step 5: Solve for x
   x = 3,892,061.83/2,629.87
6. Step 6: Final answer
   x = 1,479.95