Finding the Fourth Proportional to 2,628.72, 3,941.68 and 986.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.72 : 3,941.68 = 986.48 : x
2. Step 2: Convert to fraction form
   2,628.72/3,941.68 = 986.48/x
3. Step 3: Cross multiply
   2,628.72x = 3,941.68 × 986.48
4. Step 4: Simplify right side
   2,628.72x = 3,888,388.49
5. Step 5: Solve for x
   x = 3,888,388.49/2,628.72
6. Step 6: Final answer
   x = 1,479.19