Finding the Fourth Proportional to 2,607.69, 3,912.15 and 758.77

Step by Step Solution

1. Step 1: Write the proportion equation
   2,607.69 : 3,912.15 = 758.77 : x
2. Step 2: Convert to fraction form
   2,607.69/3,912.15 = 758.77/x
3. Step 3: Cross multiply
   2,607.69x = 3,912.15 × 758.77
4. Step 4: Simplify right side
   2,607.69x = 2,968,410.85
5. Step 5: Solve for x
   x = 2,968,410.85/2,607.69
6. Step 6: Final answer
   x = 1,138.33