Finding the Fourth Proportional to 2,068.32, 3,103.86 and 769.80

Step by Step Solution

1. Step 1: Write the proportion equation
   2,068.32 : 3,103.86 = 769.80 : x
2. Step 2: Convert to fraction form
   2,068.32/3,103.86 = 769.80/x
3. Step 3: Cross multiply
   2,068.32x = 3,103.86 × 769.80
4. Step 4: Simplify right side
   2,068.32x = 2,389,351.43
5. Step 5: Solve for x
   x = 2,389,351.43/2,068.32
6. Step 6: Final answer
   x = 1,155.21