Finding the Fourth Proportional to 2,606.55, 3,909.21 and 757.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,606.55 : 3,909.21 = 757.25 : x
2. Step 2: Convert to fraction form
   2,606.55/3,909.21 = 757.25/x
3. Step 3: Cross multiply
   2,606.55x = 3,909.21 × 757.25
4. Step 4: Simplify right side
   2,606.55x = 2,960,249.27
5. Step 5: Solve for x
   x = 2,960,249.27/2,606.55
6. Step 6: Final answer
   x = 1,135.70