Finding the Fourth Proportional to 1,164.75, 1,607.43 and 667.55

Step by Step Solution

1. Step 1: Write the proportion equation
   1,164.75 : 1,607.43 = 667.55 : x
2. Step 2: Convert to fraction form
   1,164.75/1,607.43 = 667.55/x
3. Step 3: Cross multiply
   1,164.75x = 1,607.43 × 667.55
4. Step 4: Simplify right side
   1,164.75x = 1,073,031.86
5. Step 5: Solve for x
   x = 1,073,031.86/1,164.75
6. Step 6: Final answer
   x = 921.26