Finding the Fourth Proportional to 2,069.82, 3,105.18 and 771.48

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.82 : 3,105.18 = 771.48 : x
2. Step 2: Convert to fraction form
   2,069.82/3,105.18 = 771.48/x
3. Step 3: Cross multiply
   2,069.82x = 3,105.18 × 771.48
4. Step 4: Simplify right side
   2,069.82x = 2,395,584.27
5. Step 5: Solve for x
   x = 2,395,584.27/2,069.82
6. Step 6: Final answer
   x = 1,157.39