Finding the Fourth Proportional to 1,165.34, 1,608.15 and 668.15

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165.34 : 1,608.15 = 668.15 : x
2. Step 2: Convert to fraction form
   1,165.34/1,608.15 = 668.15/x
3. Step 3: Cross multiply
   1,165.34x = 1,608.15 × 668.15
4. Step 4: Simplify right side
   1,165.34x = 1,074,485.92
5. Step 5: Solve for x
   x = 1,074,485.92/1,165.34
6. Step 6: Final answer
   x = 922.04