Finding the Fourth Proportional to 1,398.73, 1,930.25 and 769.33

Step by Step Solution

1. Step 1: Write the proportion equation
   1,398.73 : 1,930.25 = 769.33 : x
2. Step 2: Convert to fraction form
   1,398.73/1,930.25 = 769.33/x
3. Step 3: Cross multiply
   1,398.73x = 1,930.25 × 769.33
4. Step 4: Simplify right side
   1,398.73x = 1,484,989.58
5. Step 5: Solve for x
   x = 1,484,989.58/1,398.73
6. Step 6: Final answer
   x = 1,061.67