Finding the Fourth Proportional to 1,394.72, 2,087.46 and 769.05

Step by Step Solution

1. Step 1: Write the proportion equation
   1,394.72 : 2,087.46 = 769.05 : x
2. Step 2: Convert to fraction form
   1,394.72/2,087.46 = 769.05/x
3. Step 3: Cross multiply
   1,394.72x = 2,087.46 × 769.05
4. Step 4: Simplify right side
   1,394.72x = 1,605,361.11
5. Step 5: Solve for x
   x = 1,605,361.11/1,394.72
6. Step 6: Final answer
   x = 1,151.03