Finding the Fourth Proportional to 2,606.78, 3,909.33 and 758.03

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.78 : 3,909.33 = 758.03 : x
2. Step 2: Convert to fraction form
   2,606.78/3,909.33 = 758.03/x
3. Step 3: Cross multiply
   2,606.78x = 3,909.33 × 758.03
4. Step 4: Simplify right side
   2,606.78x = 2,963,369.87
5. Step 5: Solve for x
   x = 2,963,369.87/2,606.78
6. Step 6: Final answer
   x = 1,136.79