Finding the Fourth Proportional to 7,139.98, 10,707.90 and 2,756.42

Step by Step Solution

1. Step 1: Write the proportion equation
   7,139.98 : 10,707.90 = 2,756.42 : x
2. Step 2: Convert to fraction form
   7,139.98/10,707.90 = 2,756.42/x
3. Step 3: Cross multiply
   7,139.98x = 10,707.90 × 2,756.42
4. Step 4: Simplify right side
   7,139.98x = 29,515,469.72
5. Step 5: Solve for x
   x = 29,515,469.72/7,139.98
6. Step 6: Final answer
   x = 4,133.83