Finding the Fourth Proportional to 1,066.82, 1,469.25 and 919.40

Step by Step Solution

1. Step 1: Write the proportion equation
   1,066.82 : 1,469.25 = 919.40 : x
2. Step 2: Convert to fraction form
   1,066.82/1,469.25 = 919.40/x
3. Step 3: Cross multiply
   1,066.82x = 1,469.25 × 919.40
4. Step 4: Simplify right side
   1,066.82x = 1,350,821.10
5. Step 5: Solve for x
   x = 1,350,821.10/1,066.82
6. Step 6: Final answer
   x = 1,266.22