Finding the Fourth Proportional to 1,166.76, 1,609.98 and 669.42

Step by Step Solution

1. Step 1: Write the proportion equation
   1,166.76 : 1,609.98 = 669.42 : x
2. Step 2: Convert to fraction form
   1,166.76/1,609.98 = 669.42/x
3. Step 3: Cross multiply
   1,166.76x = 1,609.98 × 669.42
4. Step 4: Simplify right side
   1,166.76x = 1,077,752.81
5. Step 5: Solve for x
   x = 1,077,752.81/1,166.76
6. Step 6: Final answer
   x = 923.71