Finding the Fourth Proportional to 2,629.86, 3,944.64 and 986.27

Step by Step Solution

1. Step 1: Write the proportion equation
   2,629.86 : 3,944.64 = 986.27 : x
2. Step 2: Convert to fraction form
   2,629.86/3,944.64 = 986.27/x
3. Step 3: Cross multiply
   2,629.86x = 3,944.64 × 986.27
4. Step 4: Simplify right side
   2,629.86x = 3,890,480.71
5. Step 5: Solve for x
   x = 3,890,480.71/2,629.86
6. Step 6: Final answer
   x = 1,479.35