Finding the Fourth Proportional to 1,165.37, 1,608.20 and 667.98

Step by Step Solution

1. Step 1: Write the proportion equation
   1,165.37 : 1,608.20 = 667.98 : x
2. Step 2: Convert to fraction form
   1,165.37/1,608.20 = 667.98/x
3. Step 3: Cross multiply
   1,165.37x = 1,608.20 × 667.98
4. Step 4: Simplify right side
   1,165.37x = 1,074,245.44
5. Step 5: Solve for x
   x = 1,074,245.44/1,165.37
6. Step 6: Final answer
   x = 921.81