Finding the Fourth Proportional to 2,072.82, 3,109.41 and 756.90

Step by Step Solution

1. Step 1: Write the proportion equation
   2,072.82 : 3,109.41 = 756.90 : x
2. Step 2: Convert to fraction form
   2,072.82/3,109.41 = 756.90/x
3. Step 3: Cross multiply
   2,072.82x = 3,109.41 × 756.90
4. Step 4: Simplify right side
   2,072.82x = 2,353,512.43
5. Step 5: Solve for x
   x = 2,353,512.43/2,072.82
6. Step 6: Final answer
   x = 1,135.42