Finding the Fourth Proportional to 1,399.04, 1,930.59 and 769.44

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.04 : 1,930.59 = 769.44 : x
2. Step 2: Convert to fraction form
   1,399.04/1,930.59 = 769.44/x
3. Step 3: Cross multiply
   1,399.04x = 1,930.59 × 769.44
4. Step 4: Simplify right side
   1,399.04x = 1,485,473.17
5. Step 5: Solve for x
   x = 1,485,473.17/1,399.04
6. Step 6: Final answer
   x = 1,061.78