Finding the Fourth Proportional to 1,064.69, 1,469.45 and 889.97

Step by Step Solution

1. Step 1: Write the proportion equation
   1,064.69 : 1,469.45 = 889.97 : x
2. Step 2: Convert to fraction form
   1,064.69/1,469.45 = 889.97/x
3. Step 3: Cross multiply
   1,064.69x = 1,469.45 × 889.97
4. Step 4: Simplify right side
   1,064.69x = 1,307,766.42
5. Step 5: Solve for x
   x = 1,307,766.42/1,064.69
6. Step 6: Final answer
   x = 1,228.31