Finding the Fourth Proportional to 1,191.37, 1,644.04 and 667.39

Step by Step Solution

1. Step 1: Write the proportion equation
   1,191.37 : 1,644.04 = 667.39 : x
2. Step 2: Convert to fraction form
   1,191.37/1,644.04 = 667.39/x
3. Step 3: Cross multiply
   1,191.37x = 1,644.04 × 667.39
4. Step 4: Simplify right side
   1,191.37x = 1,097,215.86
5. Step 5: Solve for x
   x = 1,097,215.86/1,191.37
6. Step 6: Final answer
   x = 920.97