Finding the Fourth Proportional to 2,069.10, 3,104.25 and 770.25

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.10 : 3,104.25 = 770.25 : x
2. Step 2: Convert to fraction form
   2,069.10/3,104.25 = 770.25/x
3. Step 3: Cross multiply
   2,069.10x = 3,104.25 × 770.25
4. Step 4: Simplify right side
   2,069.10x = 2,391,048.56
5. Step 5: Solve for x
   x = 2,391,048.56/2,069.10
6. Step 6: Final answer
   x = 1,155.60