Finding the Fourth Proportional to 2,629.98, 3,945.65 and 986.63

Step by Step Solution

1. Step 1: Write the proportion equation
   2,629.98 : 3,945.65 = 986.63 : x
2. Step 2: Convert to fraction form
   2,629.98/3,945.65 = 986.63/x
3. Step 3: Cross multiply
   2,629.98x = 3,945.65 × 986.63
4. Step 4: Simplify right side
   2,629.98x = 3,892,872.00
5. Step 5: Solve for x
   x = 3,892,872.00/2,629.98
6. Step 6: Final answer
   x = 1,480.19