Finding the Fourth Proportional to 2,069.34, 3,104.05 and 770.55

Step by Step Solution

1. Step 1: Write the proportion equation
   2,069.34 : 3,104.05 = 770.55 : x
2. Step 2: Convert to fraction form
   2,069.34/3,104.05 = 770.55/x
3. Step 3: Cross multiply
   2,069.34x = 3,104.05 × 770.55
4. Step 4: Simplify right side
   2,069.34x = 2,391,825.73
5. Step 5: Solve for x
   x = 2,391,825.73/2,069.34
6. Step 6: Final answer
   x = 1,155.84