Finding the Fourth Proportional to 2,628.63, 3,943.49 and 779.72

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.63 : 3,943.49 = 779.72 : x
2. Step 2: Convert to fraction form
   2,628.63/3,943.49 = 779.72/x
3. Step 3: Cross multiply
   2,628.63x = 3,943.49 × 779.72
4. Step 4: Simplify right side
   2,628.63x = 3,074,794.41
5. Step 5: Solve for x
   x = 3,074,794.41/2,628.63
6. Step 6: Final answer
   x = 1,169.73