Finding the Fourth Proportional to 1,141.29, 1,574.52 and 669.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,141.29 : 1,574.52 = 669.09 : x
2. Step 2: Convert to fraction form
   1,141.29/1,574.52 = 669.09/x
3. Step 3: Cross multiply
   1,141.29x = 1,574.52 × 669.09
4. Step 4: Simplify right side
   1,141.29x = 1,053,495.59
5. Step 5: Solve for x
   x = 1,053,495.59/1,141.29
6. Step 6: Final answer
   x = 923.07