Finding the Fourth Proportional to 1,166.69, 1,612.36 and 956.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,166.69 : 1,612.36 = 956.55 : x
2. Step 2: Convert to fraction form
   1,166.69/1,612.36 = 956.55/x
3. Step 3: Cross multiply
   1,166.69x = 1,612.36 × 956.55
4. Step 4: Simplify right side
   1,166.69x = 1,542,300.57
5. Step 5: Solve for x
   x = 1,542,300.57/1,166.69
6. Step 6: Final answer
   x = 1,321.94