Finding the Fourth Proportional to 1,166.50, 1,609.72 and 669.09

Step by Step Solution

1. Step 1: Write the proportion equation
   1,166.50 : 1,609.72 = 669.09 : x
2. Step 2: Convert to fraction form
   1,166.50/1,609.72 = 669.09/x
3. Step 3: Cross multiply
   1,166.50x = 1,609.72 × 669.09
4. Step 4: Simplify right side
   1,166.50x = 1,077,045.88
5. Step 5: Solve for x
   x = 1,077,045.88/1,166.50
6. Step 6: Final answer
   x = 923.32