Finding the Fourth Proportional to 1,399.04, 1,930.70 and 769.62

Step by Step Solution

1. Step 1: Write the proportion equation
   1,399.04 : 1,930.70 = 769.62 : x
2. Step 2: Convert to fraction form
   1,399.04/1,930.70 = 769.62/x
3. Step 3: Cross multiply
   1,399.04x = 1,930.70 × 769.62
4. Step 4: Simplify right side
   1,399.04x = 1,485,905.33
5. Step 5: Solve for x
   x = 1,485,905.33/1,399.04
6. Step 6: Final answer
   x = 1,062.09