Finding the Fourth Proportional to 2,628.27, 3,942.52 and 779.35

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.27 : 3,942.52 = 779.35 : x
2. Step 2: Convert to fraction form
   2,628.27/3,942.52 = 779.35/x
3. Step 3: Cross multiply
   2,628.27x = 3,942.52 × 779.35
4. Step 4: Simplify right side
   2,628.27x = 3,072,602.96
5. Step 5: Solve for x
   x = 3,072,602.96/2,628.27
6. Step 6: Final answer
   x = 1,169.06