Finding the Fourth Proportional to 2,628.02, 3,942.15 and 779.10

Step by Step Solution

1. Step 1: Write the proportion equation
   2,628.02 : 3,942.15 = 779.10 : x
2. Step 2: Convert to fraction form
   2,628.02/3,942.15 = 779.10/x
3. Step 3: Cross multiply
   2,628.02x = 3,942.15 × 779.10
4. Step 4: Simplify right side
   2,628.02x = 3,071,329.07
5. Step 5: Solve for x
   x = 3,071,329.07/2,628.02
6. Step 6: Final answer
   x = 1,168.68