Finding the Fourth Proportional to 1,165.55, 1,608.39 and 668.16

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165.55 : 1,608.39 = 668.16 : x
2. Step 2: Convert to fraction form
   1,165.55/1,608.39 = 668.16/x
3. Step 3: Cross multiply
   1,165.55x = 1,608.39 × 668.16
4. Step 4: Simplify right side
   1,165.55x = 1,074,661.86
5. Step 5: Solve for x
   x = 1,074,661.86/1,165.55
6. Step 6: Final answer
   x = 922.03